题目内容
The workers ________ busily when the boss came to look for something she ________ in the office.
[ ]
A.had worked; had left B.working; had left
C.were working; had eft D.had worked; left
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题目内容
The workers ________ busily when the boss came to look for something she ________ in the office.
[ ]
A.had worked; had left B.working; had left
C.were working; had eft D.had worked; left