The workers busily when the boss came to look for something she in the office. A had worke

发布时间:2020-08-15 00:25:41

The workers     busily when the boss came to look for something she     in the office.
A had worked, had left  B were working ; had left  C working ; had left  D had worked; left

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解析:前一空表示当时正在进行的动作,所以用过去进行时,第二空用过去进行时表示这动作在came之前。
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