41.In Paris there is a popular saying ( C ) you have not bee

41.In Paris there is a popular saying ( C ) you have not been to Paris if you haven't been to the Eiffel Tower.
A.which B.why C.that D.whether
42.I don't think it will be ( C ) you know how to improve your English study.
A.long after B.long before C.long since D.far from that
43.Is it true (C ) the rain stops,it will be as hot as in the summer here?
A.when B.that when C.whenever D.that
44.His eyes were closed,so I said nothing,but put the chair ( D ) he would see he woke.
A.when; when B.where; where C.when; where D.where; when
45.surprised us most Tom should have left without a word.( A)
A.He;why B.It;that C.This; what D.That; that
46.I don’t think that the book is very useful ,_D__
A.do I B.is it C.doesn’t it D.isn’t it
47.I was told _D Bill Gates was thirteen he began to play with computers.
A．that how B．how that C．when that D．that when
48._B_leaves the room last ought to turn off the lights.
A.Who B.Whoever C.Anyone D.The person
49.The reason is__C_I missed the bus.
A.that B.when C.why D.what
50.__troubles me is ____I can’t learn all these English idioms by heart.(D)
A.That,that B.What,what C.That,what D.What,that