问题

I know ______ I promised to take you to dinner, but Iwon’t finish working until ten o’clock.
A:that
B:if
C:what
D:why
B:if
C:what
D:why
正确答案是:
同类题型
____ English is concerned, he is the best in our class
unemployment and crime are high, it can beassumed that the latter is due to the former.
Is this your coat _____ his coat
Americans eat______vegetables per person today as they did in
He always did well at school _____ havingto do part–time jobs every now and then.