It is desirable that you_____ some familiarity with computers.
A、
should have
B、
had
C、
are having
D、
could have
【正确答案】
A
【答案解析】
解析：It is desirable that…句型中，that引导的从句用虚拟语气，谓语动词用“should+动词原形”，should可以省略，故选A。
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