The computers are very important．They can railways and fly aeroplanes and spaceships． [ ] A．operate B．operating C．operated D．open 题目和参考答案——青夏教育精英家教网——

题目内容

The computers are very important．They can ________ railways and fly aeroplanes and spaceships．

[　　]

A．operate

B．operating

C．operated

D．open

答案：A

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