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1、[单选题]Robert is said ________ abroad, but I don’t know what country he studied in.
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A.to have studied
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B.to study
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C.to be studying
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D.to have been studying
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2、[单选题]The old man, ________ abroad for twenty years, is on the way back to his motherland.
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A.to work
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B.working
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C.to have worked
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D.having worked
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3、[单选题]Linda worked for the Minnesota Manufacturing and Mining pany, ________ as 3M.
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A.knowing
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B.known
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C.being known
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D.to be known
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4、[单选题]If you are planning to spend your money having fun this week, better ________ it—you’ve got some big bills ing.
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A.forget
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B.forgot
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C.forgetting
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D.to forget
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5、[单选题]Having been attacked by terrorists, ________ .
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A.doctors came to their rescue
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B.the tall building collapsed
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C.an emergency measure was taken
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D.warnings were given to tourists
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6、[单选题]The man insisted ________ a taxi for me even though I told him I lived nearby.
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A.find
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B.to find
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C.on finding
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D.in finding
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7、[单选题]________ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.
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A.To wait
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B.Have waited
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C.Having waited
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D.To have waited
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8、[单选题]Having a trip abroad is certainly good for the old couple, but it remains ________ whether they will enjoy it.
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A.to see
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B.to be seen
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C.seeing
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D.seen
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9、[单选题]My advisor encouraged ________ a summer course to improve my writing skills.
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A.for me taking
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B.me taking
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C.for me to take
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D.me to take
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10、[单选题]________ the programme, they have to stay there for another two weeks.
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A.Not pleting
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B.Not pleted
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C.Not having pleted
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D.Having not pleted
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11、[单选题]“We can’t go out in this weather,” said Bob, ________ out of the window.
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A.looking
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B.to look
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C.looked
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D.having looked
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12、[单选题]Reading is an experience quite different from watching TV; there are pictures ________ in your mind instead of before your eyes.
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A.to form
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B.form
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C.forming
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D.having formed
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13、[单选题]The disc, digitally ________ in the studio, sounded fantastic at the party that night.
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A.recorded
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B.recording
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C.to be recorded
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D.having recorded
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14、[单选题]________ with the size of the whole earth, the biggest ocean doesn’t seem big at all.
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A.pare
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B.When paring
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C.paring
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D.When pared
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15、[单选题]When flint ________ to the market, these products enjoyed great success.
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A.introducing
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B.introduced
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C.introduce
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D.being introduced
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