大学英语：四级语法预测题：The train she was travelling was late

　　16、Is oxygen the only gas helps fire burn?

　　A.it B.which C./ D.that

　　17、The Second World War millions of people were killed ended in 1945.

　　A.on which B.where C.in that D.during which

　　18、The train she was travelling was late.

　　A.on that B.for which C.on which D.which

　　19、Winter is the time of year the days are short and nights are long.

　　A.on which B.that C.when D.where

　　20、I’ll show you a store you may buy all you need.

　　A.that, that B.which, that C.where, which D.in which, /
16、D 17、D 18、C 19、C 20、D