问题
It suddenly occurred to him ____ he had left his keys in the office.
A:that
B:what
C:where
D:which;
B:what
C:where
D:which;
正确答案是：
同类题型
Carol Walker didn’t turn up last time ,did she ? —-No .She _______.We had changed our plan .
Can you give some advice on what I saidjust now —Sorry My mind______
The couple are spending their holiday onis described as ore of the most beautifulislands．
______ will I stay in Singapore during the summer holiday— Let me check it for you. For two days.