题目内容

If we hard in the past few years,things so smoothly now.

A. had't worked;had gone
B. hadn't been working;wouldn't be going
C. didn't work;weren't going
D. hadn't worked;would have gone

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I ____ each of the group leaders immediately work out a practical plan of study.

A. hope
B. except
C. wish
D. suggest

--- you booked the tickets in advance,we would have left for Italy.-If so,we the ball and failed to see a lot of interesting people there.

A. had;should miss
B. should;might have missed
C. should;had missed
D. had;would have missed

从介质访问控制方法的角度来看，局域网又可分为（）和（）。

网络中常用的无线传输介质，主要有（）、（）、（）、（）。