Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
I don't suppose anyone will agree with you,_______?
Yesterday she sold her bike, _______ she bought a year ago.
There is no light in dormitory. They must have gone to the lecture,_______ ?
Sarah had her washing machine repaired the day before yesterday,_______ she? (2006 .广东)
I'm sure you'd rather she went to school by bus,_______? (2006.福建)A. hadn't youB. wouldn't youC aren't ID. didn't she