I’ll go to the library as soon as I finish what I .A. was doingB. am doingC. have doneD. h

问题补充：

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：

A. was doing

(答案→)B. am doing

C. have done

D. had been doing

解析：将去图书馆，说明这件事情还未完成，正在做这件事。句意：我一完成我正在做的事情，我就去图书馆。