1. 根据句意及中文提示填写单词。

1. （1） We will never allow anyone to （怀疑) Taiwan is from our motherland.

3. （2） You have no （选择）but to go back to your bedroom to finish your homework at once.

5. （3） What was your （原因）of being so late for school this morning?

7. （4） Before, many people （更喜欢）driving to walking, but now they have changed because of the bad traffic.

9. （5） I （简直）can't understand why you are so crazy about playing computer games.