问题
The fact is ______ he has not been seen recently.
A:what
B:that
C:why
D:if
B:that
C:why
D:if
正确答案是：
同类题型
Though the old lady used ____ her dog for awalk after supper ,now she has become used ___ at home.
She went to American two years ago .She ____there for half a year and then went to Japan
Peter regards Liaocheng as his second___ because he has lived here for ten years.