25、This is a very interesting book. I’ll buy it,         .

       A．how much may it cost                    B．no matter how it may cost

       C．however much it may cost              D．how may it cost

24、

As you worked late yesterday, you         have come this morning.

       A．mayn’t                B．can’t              C．mustn’t                  D．needn’t

23、He hurried to the booking office only        that all the tickets had been sold out.

       A．to tell                                            B．to be told

       C．telling                                            D．told

22、A clean environment can help the city bid for the Olympics, which ____ will promote its economic development.

A. in nature          B. in return           C. in turn   D. in fact

21、After he retired from office, Rogers ____ painting for a while, but soon lost interest.

A. took up  B. saved up    C. kept up      D. drew up

20、.Police are now searching for a woman who is reported to ____ since the flood hit the area last Friday.

A. have been missing         B. have got lost      C. be missing  D. get lost

19、I just wonder ____ that makes him so excited.

A. why it does      B. what he does    C. how it is                 D. what it is

18、How can you expect to learn anything ____ you never listen?

A. in case             B. even if              C. unless         D. when

17、May I smoke here?

- If you ____, choose a seat in the smoking section.

A. should              B. could               C. may        D. must

16、  Five people won the “China’s Green Figure” award, a title ____ to ordinary people their contributions to environmental protection.

A. being given       B. is given            C. given       D. was given