18. We need to prevent pollution     driving cars less and developing renewable energy.

A. by         B. from

C. with      D. against

17. Windows XP, whose support has ended, is an operating system I found satisfying when it first   eight years ago.

A. turned out     B.   brought out

C. worked out    D.   came out

16. Christine is   about anything but her dress as she doesn't really care about what she looks like in the eyes of others.

A. cautious     B. optimistic

C. particular     D. curious

15. They did everything in their power to save the building dating back to the Qing Dynasty, but their efforts were     .

A. in turn       B.  in time

C. in vain         D.  in need

14. My brother's irresponsible behaviour    my mother many sleepless nights.

A. paid         B. spent

C. cost       D. took

13. Circumstances are     human control, but our conduct is in our own power.

A. within     B. against

C. beyond    D. below

12. The cafe is called E-time Coffee, which mainly   college  students  and  young people  nearby.

A. points        B. targets

C. directs     D. leads

11. John had planned to make a compromise, but   he  changed  his  mind  at   the last minute.

A. anyhow           B. somehow

C. therefore       D. otherwise

10. Our    new machines are much cheaper to run.

A. effective    B. efficient

C. energetic     D. enthusiastic

9. When the policeman stopped us, we all looked questioningly at him,   . 

A. nervously and puzzled

B. nervous and puzzling

C. nervous and puzzled

D. nervously and puzzling