英语选择题 求教（求答案和重要的解析）

英语选择题 求教（求答案和重要的解析）
1. Tom bought a lot of books in the library,most of（）were written in English.
A thatB which C whatD whom
2.We enjoyed ourselves very much in the party （）last night.
A being heldB heldC to be heldD holding
3.He did not stop his research.Nor （） let the disease stop hime from living the kind of life he had always dreamt of.
A did heB had heC he didD he had
4.We should stop here since we have been walking for hours.------（）I am a little tired
A I beg your pardon?B What do you mean?
C Sorry,i am not sureD you are right

5.（）in his test papers,he did not notice my coming
A Having absorbedB absorbedC absorbingD to be absorbed