单项选择题

（） their work will give us a much better feel for the wide differences between the two schools of thought.

A. To have reviewed
B. Having reviewed
C. Reviewing
D. Being reviewed

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单项选择题
She put an extra blanket over the baby for fear that （）

A. he catches a cold
B. he should catch a cold
C. he caught a cold
D. he be catching a cold
单项选择题
Investigators agreed that passengers on the airliner（）at the very moment of the crash.

A. should have died
B. must be dying
C. must have died
D. ought to die
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