He ______ the problem in another way but failed.

A. managed to solve　　　 B. succeeded in solving

　C. made an attempt to solve　 D. made an attempt to doing

I didn’t see what he meant _____ he explained again.

　 A. when 　 B. until

　 C. unless 　 D. if

I won’t pay $300 for the table,it’s not worth　　 .

A、very much　　 B、at all　　 C、such much　　 D、all that much

The manager can’t go abroad for a holiday at present _____ this unsolved problems.

A. thanks to　 B. because　 C. owing to　　 D. on account for

_______several times, but he doesn’t know how to do it properly.

A. Being shown　　　　　　　　　　　　　 B. Having shown

C. Having been shown　　　　　　　　　　 D. I’ve shown him

―My foot hurts terribly, doctor.
    ―Well, I wonder ______ it has been like this.
A. since when         B. since then
C. how            D. when

The student was caught _______in the exam and would be punished

　 A. cheating　　　　 B. cheat　　　　　 C. to cheat　　　　 D. cheated

She was really too buy at the time,　　 she’d have came and helped with the cooking.

A、or　　 B、but　　　 C、though　　　 D、however

When he was very young, my chemistry teacher took _____ in reading detective stories.

　 A. happiness　　　 B. delight　　　 C. joy　　　　 D. like

The lift in that tall building went wrong and got trapped _____ floors. People in it had no way to get out.

A. in 　　　　　　　　　　　 B. between

C. among 　　　　　　　　　 D. on