31.I've read all the books ____ were borrowed from the library.

　　A.they B.which C.不填 D.that

　　32.Winter is the time of year ____ the days are short and nights are long.

　　A.on which B.that C.when　　 D.where

　　33.Can you lend me the book ____ the other day?

　　A.which you talked B.that you talked C.about that you talked D.you talked about

　　34.There are two thousand students in our school , ____ are girls.

　　A.two-thirds in which B.two-thirds in them C.two-thirds of them D.of whom two-thirds

　　35.I have bought two ball pens,____ writes well.

　　A.neither of them 　 B.none of them C.neither of which　 D.none of which

　　36.Do you know the reason ____ he was late?

　　A.for which 　 B.for what C.which　 D.of which

　　37.John got beaten in the game,____ had been expected.

　　A.who B.what C.that　 D.as

　　38.I often thought of my childhood,____ I lived on a farm.

　　A.who B.when C.where　 D.which

　　39. You can take any seat ____ is free.

　　A.in which B.that C.where　 D.which

　　40.He talked about the men and books ____ interested him greatly in the school.

　　A.that 　　 B.when C.who　　 D.which