D.confuse
解析:考查动词辨析。句意:由观察和实验所获得的证据经常被用来确认一项科学理论。confirm 确认;conclude 结论,推断;consult 咨询;confuse 迷惑。
答案:A
18.The chairman is ill,so the secretary has to ______him.
A.speak up
B.speak out
C.speak for
D.stand out
解析:句意:主席病了,所以秘书得代表他讲话。speak for “代表某人讲话”。答案:C
[交际用语]
19.—Thank you for your MP4 player.I’ll get Mary to take it to you soon.
—______.I’ve bought a new one.
A.No sense
B.No hurry
C.No way
D.No use
解析:考查交际用语。由“我已经买了一个”可知是No hurry,意为“不着急”。
答案:B
20.—How are things with you?
—______.I now make enough money to pay bills and keep food on the table.
A.From bad to worse
B.Can’t complain
C.Too bad
D.Too good
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