【单选题】 (It is) (extremely) important (for) an engineer (to know) to use a computer.
A.It is
B.extremely
C.for
D.to know
网考网参考答案:D
网考网解析:
将D选项to know改为to know how。know后可接名词、代词、从句,但不可直接用know to do的形式。类似这种用法的动词还有ask, decide, discover, find out, remember, learn等,这些词的后面可接how, what, who, where, when等疑问词。
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