2. 专升本
  3. They are busy ______ in their lessons before the exam.

They are busy ______ in their lessons before the exam.

admin2012-12-31  82
问题 They are busy ______ in their lessons before the exam.
选项 A、going after
B、going over
C、going by
D、going ahead
答案B
解析 go after，“追求，追逐”；go by，“经过，顺便走访”；go ahead，“开始，前进”；go over，“复习，对……仔细检查”。
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