Was it what he said _____ made her so sad ? A. which B. why C.what D that
—Who is the man, actually? —I don’t know for sure. But I think he can be _______ but a teacher.
The last time I _______ Jack, he _______ football with classmates.
—Did you have trouble with your car this morning? — Yes, but I finally managed _______.
—Growing population resulted in growing rubbish. —There is ______that rubbish will become the major threat to human beings in future.
—Happy birthday to you! — ______.