We ________ the problem for quite some time, but we ________ any conclusion yet. A: have been discussing; haven’t reached B: have discussed; haven’t been reaching C: discussed; haven’t reached D: had discussed; haven’t reached

"Haven’t you been to London" "______ been there." A: Yes, I haven’t B: No, I haven’t C: No, I have D: Yes, I hadn’t

Inthe1950sintheUSA,mostfamilieshadjustonephoneathome,andwirelessphones_____yet. A: haven’tinvented B: haven’tbeeninvented C: hadn’tinvented D: hadn’tbeeninvented

—You haven’t been to Beijing, have you?—______________. How I wish to go there! A: Yes, I have B: Yes, I haven’t C: No, I have D: No, I haven’t

This implies that they haven’t any idea ofwhat they want to do and haven’t given anythought to what the job involves.

The signs haven't had any effect. They haven't ______ anyone. A: affected B: effected C: resulted in D: imposed

You haven't had your dinner yet ………. you? A: are B: aren't C: have D: haven't

I haven’t been to the Great Wall. This is a pity.可改写为：It is a pity that I haven’t been to the Great Wall.

I ______ from him since he left. A: didn' t hear B: haven' t heared C: haven' t heard

I haven't got a chair______.