---Thank you so much for what you have done for all of us!

---____________.

A. It does’t matter. B. Never mind. C. Don’t mention it. D. Of course ont.

---Simon said he wrote you an email. Have you ________ him yet?

---Not yet.

A. receiced B. answered to C. replied D. replied to

_______ or not it rains tomorrow, we shall go to watch the football match live.

A. If B. What C. Whether D. Believe

________ unusual day! I have seen the Hong Kong-Zhuhai-Macao Bridge with my own eyes today!

A. What a B. How a C. What an D. How an

---When did the experts leave our school yesterday?

---_________ the rain stopped.

A. Until B. Not until C. Unless D. Not unless

_______ Lei Feng passed away at a very young age, he did a lot for people during his lifetime.

A. Because B. Since C. Although D. Through

If my best friend doesn’t go to his birthday party, _________ I.

A. so do B. neither do C. so will D. neither will

The twins almost look the same. People often mistake ______ for _______.

A. one, the other. B. one , other. C. one, another D. some, others

---Keep working hard, and you’ll surely realize your dream of being an artist ____ you give it up halfway.

---I will, thank you, Miss Liu.

A. unless B. if C. since D. though

Everyone makes mistakes in life. The key is not to repeat ________ again．

A. it B. this C. that D. them