is li ming in the classroom?yes,i noticed him___(go) into it just now.

题目

is li ming in the classroom?yes,i noticed him___(go) into it just now.
i'll go to the library as soon as i finish what i __
A.have done
B.was doing
C.had done
D.am doing求答案和解释
is li ming in the classroom?yes,i noticed him___(go) into it just now.这也是一题，

答案

第一个句子：notice是感官动词 后加动词原形表示看到动作的全过程 因此最好是用go　
第二个句子：虽然主句是一般将来时,但这里不是考主将从现,仅仅是考察对时态的理解,finish后带宾语从句,从语义上理解应该是完成现在做的才去图书馆,所以应该选D