[单选题] My advisor encouraged ________ a summer course to improve my writing skills.

1、[单选题]________ such heavy pollution already, it may now be too late to clean up the river.

• A、Having suffered
• B、Suffering
• C、To suffer
• D、Suffered

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2、[单选题]Having been attacked by terrorists, ________ .

• A、doctors came to their rescue
• B、the tall building collapsed
• C、an emergency measure was taken
• D、warnings were given to tourists

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3、[单选题]My advisor encouraged ________ a summer course to improve my writing skills.

• A、for me taking
• B、me taking
• C、for me to take
• D、me to take

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4、[单选题]I don’t know whether you happen ________ , but I’m going to study in the U. S.
this September.

• A、to be heard
• B、to be hearing
• C、to hear
• D、to have heard

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5、[单选题]Having a trip abroad is certainly good for the old couple, but it remains ________ whether they will enjoy it.

• A、to see
• B、to be seen
• C、seeing
• D、seen

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