2. 考研
  3. ______he prepared his lessons well; at other times he does very poor work.

______he prepared his lessons well; at other times he does very poor work.

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问题 ______he prepared his lessons well; at other times he does very poor work.
选项 A、Now and then
B、First and last
C、On one occasion
D、At first
答案C
解析 句意：他就有一次好好得为上课做了准备，但其他时候都做得很差经。on one occasion曾经，有一次。now and then有时，时而。first and last整体来看，总的来说。atfirst首先，起初。
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考研英语一

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