Great efforts to increase grain production 　　　if food shortages are to be avoided.

　 A．could be made　　　　　　　　　　　　　　　 B．must be made

　 C．might be made　　　　　　　　　　　　　　　 D．would be made

Probability is the mathematical study of the _____ of an event's occurrence.

　　A. desire B. likelihood C. result D. effect

 I’m trying to break the _______ of getting up too late .
A. tradition       B. convenience        C. habit        D. leisure

----- How soon can you finish the large picture?

---- It will be two moths _____.

A. after I finsh it 　 　　 B. before I will finish it

C. befroe it is finished 　 D. since it has been finished

The mobile phone is sold p__________an extra cell,which is considered a big advantage.

I wonder how he_______ that to the teacher.

A dare to say　 B dare saying C not dare say　 D dared say

There are no easy answers to questions brought to us by the rapidly changing world, _______ we can try to turn challenges into opportunities.

A. so　　　　　　　　 B. but　　　　　　　 C. for　　　　　 D. then

Lei Feng street, a newly built street in the city, was named_____Comrade Lei Feng.

A. by means of　 B. instead of

C. in favor of　 D. in memory of

There must be _____ reason for what he has done.

A. much 　 B. several　 C. plenty of 　 D. some

The government’s efforts to cut the homework burden of primary and middle school students ___ mixed reactions.

A. have drown　 　B. has drawn 　　C. have been drawn D. has been drawn