B-16：be up in the ears 忙于……
A: You seem to be up in the ears. What have you been doing?
A: 你最近好像忙得不可开交。在干什么呢？
B: I've been preparing for entrance examination.
B: 我一直在准备入学考试。
A: Well, you must have adequate preparation.
A：那么你一定准备得很充分了？
B: I can't say!
B：我不敢肯定！
