答案:More than half of the staff are temporary.
11 .in vain 徒然,白费力气
(回归课本P34)Floyd Landis made several lame excuses blaming medicine he had been taking for an injury but these were all in vain.
弗洛伊德·兰蒂斯做了几次站不住脚的辩解,责怪他因伤服用的药物,但是这些都是徒劳的。
归纳拓展
vain
adj. 自负的;自视过高的;空洞的,
无用的;无谓的
a vain attempt 无用的尝试
vain promises 空头的许诺
vainly adv. 徒劳地
①We tried in vain to make him change his mind.
我们想使他改变主意,结果是白费心机。
②We tried vainly to persuade her not to go.
我们劝她别去,她不听。
③He was vain about his looks, spending hours in the gym.
他对自己的外表很自负,在健身房里一呆就是几个小时。
例句探源
12.We tried________to persuade him to stay home, but at last, he went to the construction site in spite of his bad illness.
A.vainB.in vain
C.in fact
D.in vainly
解析:选B。句意:我们极力劝说他待在家里,但大都是徒劳的,尽管他生着重病,最后还是去了工地。in vain(=vainly)徒劳地,白费力气地。
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