17. A. sound　　　　　　　 B. health　　　　　　　　　　　　 C. love　　　　　　　　　　　 D. sight

16. A. notice　　　　　　　 B. believe in　　　　　　　　　 C. doubt　　　　　　　　　　 D. guess at

14. Good technique in medicine means less pain and fewer deaths and, _____ it is our duty to master it.

A. altogether　B. therefore　C. otherwise　D. however

13. His body temperature has been _____ for three days, the highest point reaching 40℃.

A. uncommon　B. disordered　C. abnormal　D. extraordinary

12. Peter’s sudden death was a great blow to Mary and it took her quite a while to _____ the grief.

A. run over　B. take over　C. turn over　D. get over

11. The doctor would allow him to go home _____ he remained in bed.

A. as though　B. for fear that　C. on condition that　D. as far as

10. Years ago we didn’t know this, but recent science _____ that people who don’t sleep well soon get ill.

A. showed　B. has shown　C. will show　D. is showing

9. The workers are so _____ to the noise of the machine that they don’t even notice it during their work.

A. accustomed　B. subjective　C. familiar　D. associated

8. _____ is known to us all is that the old scientist, for_____ life was hard in the past, still works very hard in his eighties.

A. As; whom　B. What; whom　C. It; whose　D. As; whose