29.____________ the news, so far, has been good, there may be bad days ahead.?

A. When              B. While             C. If                D. As

31. _______ with the present situation, the local government could not find effective measures to reduce the risk of coal mine accidents.

A. Though unsatisfied                                       B. As unsatisfied    

C. Though unsatisfied it was                           D. As it was unsatisfied 

20．Not only Zhang Yimou's new movie but also some of the actors and actresses of it_________to meet the public in Shanghai next Monday.

       A．is                           B．are                         C．were                       D．Has

This can ___ her ___ touch with the workers.

A. bring; into    B. make; to    C. get, to   D. take, in

After the new technique was introduced, the factory produced _____ tractors in 1988 as the year before.

A. as twice many                            B. as many twice    

C. twice as many                            D. twice many as

We'd better hurry ______ it is getting dark.

A. and             B. but                 C. as                    D. unless

I’ll let you know ____ he comes back.

A. before                               B. because            

C. as soon as                           D. although

Eat less food _______ you want to put on weight .

A. if                  B. unless             C. until       D. as soon as

 We are going to have a barbecue _______ it rains .

A. if not             B. when              C. except that   D. unless

He lived in London for 3 months, during ____ time he learned some English.

A. this　　             B. which　            C. that　　         D. same