题目内容

If you want to visit the museum, you have to book your visit at least 2 days advance.

A. on
B. in
C. for
D. with

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average, call center workers in the company make between $ 9 and $ 14 an hour.

A. On
B. With
C. Over
D. To

The mechanical trouble has prevented them from finishing the task on .

A. duty
B. order
C. time
D. plan

The school was _______ in 1929 by a Chinese scholar.

A. established
B. placed
C. imaged
D. made

The task will not be fulfilled ___________we get help from the other departments.

A. if
B. unless
C. since
D. when

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