问题
选择题
. She _____ on this essay for twenty minutes but she has written only about a hundred words.
A．will be working
B．worked
C．has been working
D．will have worked
答案
答案：C
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. She _____ on this essay for twenty minutes but she has written only about a hundred words.
A．will be working
B．worked
C．has been working
D．will have worked
答案：C