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章节：第02章1
| 2019 | 章节练习 |
| 50.00分 | 50题 |
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- 单项选择题1、I was really too busy with my homework and I couldn't help （）housework. ( 章节：2 难度：1)
A、doing
B、do
C、did
D、done
- 单项选择题2、Mr. Alcott, headmaster of the school, refused to accept made by the Students' Union （）. ( 章节：2 难度：1)
A、either
B、neither
C、any
D、none
- 单项选择题3、I just don't understand （） that prevents so many Americans from being as happy as one might expect. ( 章节：2 难度：1)
A、why it does
B、what it does
C、what it is
D、why it is
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