问题
选择题
I'll go to the library as soon as I finish what I ________.[ ]
A. was doing
B. am doing
C. have done
D. had been doing
答案
答案：B
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I'll go to the library as soon as I finish what I ________.[ ]
A. was doing
B. am doing
C. have done
D. had been doing
答案：B