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单选题
If only I _____ how to operate a computer as you do!
A

had known

B

would know

C

should know

D

knew


参考答案

参考解析
解析:
句意:要是我像你一样懂得怎样操作电脑就好了。If only引导的句子,对现在的情况表示虚拟,用过去时,故选D。
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