In fact, the situation was so desperate that, _____ , no one could help another.

　 A. in this way 　 B. in common C. in other words　 D. in most cases

Only by shouting at the top of his voice 　　　　　　 .

　 A. he was able to make himself hear

B. he was able to make himself heard

C. was he able to make himself hear

D. was he able to make himself heard

Professor Backman took up scientific research for decades,and this is he devoted all his life to.

A.which　　 B.what　 C.where　　 D.how

He can’t help but ______ my advice.

A. follow 　　　B. to follow

C. following 　 D. followed

_______ many times, he finally managed to settle the problem.

A. Tried　　　 　　　 B. Trying　　 　　　 C. Having been tried　 D. Having tried

英語和數(shù)學， 你更喜歡哪一科？（prefer）

-------Oh, there are so many kinds of color TV sets in this shop!
------- Do you wish to buy______?
A.this         B. that         C. it          D. one

21.  I want your_________, sir. I don t know what to do.

A.advices

B.piece of advices

C.advice

D.advise

My command of Chinese is not_____ yours.

　 A. as half as 　 B. so half good as

　 C. good as half as 　 D. half so good as

Tough _______money,his parents managed to to send him to a key university.

A.lacked 　 B.lacking of 　　　 C.lacking 　　　　 D.lacked in