几道英语单选提1._____ the silence for the pauses,we could hear othe

几道英语单选提
1._____ the silence for the pauses,we could hear other's breathing and could almost bear our own hearbeats.
A.In B.For C.Under D.Between
2.Dolly wants to cycle round the word and she is book really keen____the idea.
A.on B.for C.at D.with
3.The book was written in 1946,____ the education system has witness great charges.
A.when B.during which C.since then D.since when
4.By serving others,a person focuses on someone other than himself or hearself,____can be very eye-opening and rewarding.
A.who B.which C.what D.that
【答案要求包括语法分析：成分（状语、定语等）+形式（分词等）+语态（主动、被动、状态等】特例除外.
2.Dolly wants to cycle round the word and she is really keen____the idea.
A.on B.for C.at D.with