大学英语：四级语法预测题：Is oxygen the only gas helps fire burn?

　　56、Is oxygen the only gas helps fire burn?

　　A.that B./ C.which D.what

　　57、The first place we visited in that city was a big factory.

　　A.where B.in which C.that D.which

　　58、Which is the largest bridge was built across the river?

　　A.that B.which C.where D.on which

　　59、Please pass me the dictionary cover is black.

　　A.which B.its C.whose D.which of

　　60、 is natural, she goes abroad with her husband.

　　A.It B.What C.Which D.As

　　56、A 57、C 58、A 59、C 60、D