2. 外语
  3. None of us understood what the lecturer was______ at.

None of us understood what the lecturer was______ at.

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问题 None of us understood what the lecturer was______ at.
选项 A、accounting
B、explaining
C、driving
D、working
答案C
解析 drive／get at想说明(……问题)，是……意思(注：该短语一般与what连用，并且要用进行时态，如：What on earth are you driving at?I don’t know whether you see what I’m driving at．What was his speech driving at?)。account(for)vi.解释，说明(原因)。explain vt．解释。work at从事于，致力于，学习，研究，设法解决。
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