单项选择题

They don't have any idea about ______ they have to do all the works by themselves.

A. what
B. where
C. why
D. because
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单项选择题
The director explained the jobs done with such ______ that no one found any extra needs to explain more.
A. enthusiastic
B. enthusiastically
C. enthusiasm
D. enthusiast
单项选择题
Once he completes his assignments by the deadline, he is expected ______ a day off.
A. to be taken
B. to take
C. taking
D. took
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