1 . 根据句意，选择单词并以其适当形式填空。

1. Destruction of the environment is one of the most serious ______ we face.
2. Usually a child’s behavior is a ______ of his family environment.
3. The price of wine varies ______ depending on where it comes from.
4. With the exam ______, I find myself working harder than ever before.
5. He spent the evening ______ up Christmas presents.
6. Students should establish an ______ of environmental protection.
7. They ignored the ______ time and were late for the meeting.
8. The shop is small, but it offers a ______ of nice goods.
9. I ______ her to think twice before she makes a decision.
10. Betty ______ to Steve that Sara never gave her a chance to talk.

2 . 根据句意，选择单词或短语并以其适当形式填空。

exploring;

actually;

breath;

reflect;

volunteers

1. As one of the ________, I have worked in an old people’s home for 3 years.
2. The experts are ________ all possible ways to improve food production.
3. Running to school all the way, the little boy was out of ________.
4. ________, it’s not confusing that a word has different meanings in different contexts.
5. The number of college graduates in a country can ________ its cultural standards.