—Has Tom finished his task yet?—I’m not sure. But he _____ on it last weekA．was_刷题宝

题干

—Has Tom finished his task yet?
—I’m not sure. But he _____ on it last week

A．was working	B．has been working
C．worked	D．had been working

上一题下一题 0.64难度单项选择更新时间:2013-10-09 03:16:52

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