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1、[单选题]The research is so designed that once ________ nothing can be done to change it.
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A.begins
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B.having begun
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C.beginning
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D.begun
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2、[单选题]Having been ill in bed for nearly a month, he had a hard time ________ the exam.
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A.pass
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B.to pass
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C.passed
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D.passing
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3、[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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4、[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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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]________ by the beauty of nature, the girl from London decided to stay another two days off the farm.
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A.Attracting
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B.Attracted
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C.To be attracted
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D.Having attracted
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7、[单选题]Don’t leave the water ________ while you brush your teeth.
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A.run
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B.running
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C.being run
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D.to run
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8、[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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9、[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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10、[单选题]I’ve worked with child before, so I know what ________ in my new job.
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A.expected
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B.to expect
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C.to be expecting
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D.expect
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11、[单选题]According to a recent U. S. survey, children spend up to 25 hours a week ________ TV.
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A.to watch
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B.to watching
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C.watching
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D.watch
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12、[单选题]It is said that in Australia there is more land than the government knows ________.
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A.it what to do with
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B.what to do it with
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C.what to do with it
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D.to do what with it
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13、[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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14、[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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15、[单选题]Sarah, hurry up. I’m afraid you can’t have time to ________ before the party.
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A.get changed
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B.get change
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C.get changing
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D.get to change
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