4. Today some newly-produced mobile phones can take pictures ______ a camera.

3. Hangzhou is famous ______ the West Lake.

2. Mum, today is Mother’s Day. Mike and I want to invite you to have dinner _____ us at Zhonglou Restaurant.

1. ---How are you going to the train station to meet your aunt?

　　 ---I’m going there _______ my car.

20. ______ you can’t answer this question, we have to ask someone else for help.

　　 A. Although　 B. While　 C. Whether　 D. Since

19. ---Do you remember our pleasant journey to Xi’an?

　　 ---Of course. I remember everything ______ it happened yesterday.

　　 A. as soon as　　　　　　 B. even though

　　 C. rather than　　　　　　 D. as if

18. The mountain was ______ steep _____ few people in our city reached the top.

　　 A. so…as　 B. so…that　 C. as…as　 D. too…to

17. Hurry up, _______ you will miss the train.

　　 A. and　 B. so　 C. however　 D. or

16. ---This dress was last year’s style.

　　 ---I think it still looks perfect ______ it has gone out this year.

　　 A. so that　 B. even though　 C. as if　 D. ever since

15. The book was so interesting that he had read it for three hours ______ he realized it.

　　 A. when　 B. until　 C. after　 D. before