3. As _____ tourist attraction, the Great Wall does have _____ strong attraction to visitors from home and abroad.

A. the; 不填　　　 B. the; a　　　 C. a; 不填　　 D. a; the

2. The bridge over the canal is 1, 000 meters ____ length.

　　 A. with　　 B. in　　　　 C. at　　　　 D. on

1. As we can see, the prices of vegetables _____ according to the season.

　　 A. vary　　 B. fall　　　 C. rise　　　 D. swing

12.Only in this way,_________.

11.Thirdly,_________.

10.In addition,________.

9.First of all,________.

8.In spite of all these,there are still many ways________.

7.Finaly,________.

4.It well cause many serious results if_______.