-- I have got a headache. -- No wonder. You_________ on the math exercises too l

题干

-- I have got a headache.
-- No wonder. You_________ on the math exercises too long.

A．work

B．are working

C．have been working

D．worked

上一题下一题 0.85难度单项选择更新时间:2014-03-17 10:32:14

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