When the manager came in，the workers pretended________hard on their machines.A．t_刷题宝

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When the manager came in，the workers pretended________hard on their machines.

A．to work	B．to be working
C．to have worked	D．working

上一题下一题 0.64难度单项选择更新时间:2013-04-13 08:26:10

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