30.She can't help ________ the house because she's busy making a cake.
A.to clean
B.cleaning
C.cleaned
D.being cleaned
【答案与解析】 A 此题容易误选B项,简单地套用can't help doing sth这一结构。其实此题应选A项,can't help doing sth“禁不住做某事;情不自禁地做某事”;can't help to do sth“不能帮助做某事”。题意:她不能帮助打扫房子因为她正在忙着做蛋糕。
31.We ________ here at lunch time; we were delayed at the airport, though.
A.could be
B.should be
C.must have been
D.would have been
【答案与解析】 D 考查虚拟语气。题意:我们本来能够在午饭时间到达的,但是我们在机场耽搁了。此处隐含着对过去的假设,后半句才是过去的事实。
32.“I don't think it's my ________ that the TV blew up. I just turned it on,that's all,” said the boy.
A.error
B.mistake
C.fault
D.duty
【答案与解析】 C 考查易混名词辨析。duty“值日”明显与题意不符,可先排除;error,mistake和fault都可意为“错误”,但用法不同。error的使用范围较窄,常指在计算、书写等过程中出现的差错;mistake范围较宽,可指各种错误;fault通常指人的“过失、过错”。题意:男孩说“电视爆炸了不是我的过错。我不过是把它打开了而已。”
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