Question

The teachers are busy _______ the exam papers while the students are busy ________ the exam.

1. A.
   prepare; prepare for
2. B.
   preparing; preparing for
3. C.
   prepare for; prepare
4. D.
   preparing for; preparing

Answer 1

B
be busy doing sth．“忙于干某事”，prepare the exam papers“准备试卷”；prepare for the exam“为考试而做准备”。