13. John and his brother have totally different ________(性格).

12. He gave us some ________(建议) on how to learn English.

11. The camel is a ________(有用的) animal.

10. People look at each other in ________(恐惧).

9. This flower ________(闻起来) good.

8. The patient isn’t out of ________(危险).

7. They found it hard to ________(决定) whether to go swimming or not.

6. We can be sure that he is ________(诚实的).

5. He feels ________(紧张不安) because he will take an English exam tomorrow.

4. It’s his duty to solve the ________(问题).