问题

________ you have seen things like thesebefore doesn’t matter.
A:If
B:Whether
C:What
D:When
B:Whether
C:What
D:When
正确答案是:
同类题型
he meal ________, themother sat down for a good rest.
She is to household dust, so she often wears a hat when cleaning the house.
If farming goes ________ nature, all kinds of disasters are the results
There isn’t such a word ______ I know
Let him______a rest I think he must betired after the long walk