题目内容

在下列各句的空白处填入一个适当的词,使句子意思完整、语法正确。
1. How q______ time passed. I've been in my hometown for two months.
2. It's our d______ to protect (保护) the environment.
3. I think this dictionary is h______ for your study.
4. Hurry up, or we won't c______ the early bus.
5. Don't be scared to make m______ when you speak a foreign language.
1. quickly  2. duty  3. helpful  4. catch  5. mistakes
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