单项选择题

It is unusual for there ______ so many tourists on the beach at this time of the year.

A．be
B．were
C．being
D．to be
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单项选择题
Reasons for careful teaching range from preventing a child ______ to keeping a child occupied.
A．sinking behind
B．falling behind
C．drawing behind
D．crawling behind
单项选择题
Weather ______ , the Johnsons will hold an open-air garden party.
A．permits
B．permitted
C．permitting
D．being permitted
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