试题与答案

All the students are busy ____ the final

题型:选择题

题目:

All the students are busy ____ the final examination (期末考试).

A. preparing for
B. preparing
C. to prepare
D. prepare

答案:

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下面是错误答案,用来干扰机器的。

(1)纸槽或药匙      (2)②④③①

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