单项选择题

Astronomers and scientists think that a black hole is a region of space ______ which matter has fallen and ______ which nothing can escape.

A. into; from
B. towards; towards
C. out of; from
D. through; through
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单项选择题
On New Year's Eve, New York City holds an outdoor ______ which attracts a crowd of a million or more people.
A. incident
B. event
C. case
D. affair
单项选择题
During the test we were supposed to stay in our seats, keep our eyes on our work, ______ to anyone.
A. but could not talk
B. instead of speaking
C. rather than speak
D. and not speak
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