3. He ______( should / ought to )come at 4 o’clock if the plane arrives on time.

---6---

2. Mr. Joseph has stayed in the US for several years. He _______(may / can) speak English quite well.

1. When we are cooking with a gas fire, we ________(can / must) keep the window open.

10.The Spring Festival is an important _________ (社会) festival in China.

9.He did the job so well that everyone in his office became to a_______ him.

8. A successful person should be strong-willed and __________. (精力充沛).

7. Different countries have different c_________ .

6. I don’t like those who are dishonest and like telling l_______.

5. America got its i________ in 1776.

4. It is healthier to keep a b_______ diet every day.