Some students often listen to music　　　 classes to refresh themselves.?

A.between　　 B.among　　　　　 C.over　　　　　 D.during

These trousers are dirty and wet — I’ll change into my _____.

A. another　　　　　　　　　 B. trousers

C. others　　　　　　　　　 D. other

Speaking of all the songs he has written，I think this one probably ______ everyone.

A．is better?known to B．is well?known to

C．is best?known to D．is most?known to

He realized his mistakes and took measures to reduce the loss _____ it was too late.

　 A. until　 B. when　 C. before　 D. as

Miss Li ________ as a biology teacher for fifteen years in our school, and now she is Party secretary of our city.

A. works　　　　　 B. worked　　　 C. had worked　 D. has worked

---- who, _____ is the most popular teacher in our school?

---- I think it’s Mr. Zhang.

A. first of all　　 B. in your opinion　　　 C. more or less　　　　　 D. in all

Frank was on the point of leaving ______ he noticed a letter lying on the table.

A. when　　　　 　　 B. before　　　 C. while　　　　 D. as　

You've got only two tickets for the coming show?I think there______be three at least.

A.should　　　　　 B.may

C.can　　　　　　 D.must

“It is not only you but also Tom who _________,” said the teacher after knowing what had

　 happened.

A. are to be blamed　 　　　　　　　 B. is to be blamed　　

C. are to blame　　 D. is to blame

With many major economic problems________ to be solved, there is no point predicting the growth rate of this year now.

A. remaining　　 　　　　　　　 B. remained　　

C. have remained　　　 　　　　D. having remained