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Studies show that people are more _____ to suffer from back problems if they always sit before computer screens for long hours.
A.likelyB.possibleC.probableD.sure
A

试题分析:考查形容词:ABC都是“可能”,D项是“确定”,句意:研究表明,如果人们总是坐在电脑屏幕面前很长时间会有背部的问题。所以在ABC里面选择,这里使用的是句型:Sb/Sth is likely to do…,其他两个单词不能用于这个句型,选A。
点评:前面三个形容词是近义词:注意possible 、likely 、probable 都可以用于It is+adj+that从句的句型,possible还可以用于It is+adj+to do的句型,但是只有likely用于句型:Sb/sth is likely to do这个句型。
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