Research has been limited to ____ production profits, rather than ____ that GM foods are safe.
| A．increasing; make sure | B．increasing; making sure |
| C．increase; make sure | D．increase; making sure |
Mr Wang must go to Beijing to vis I tMrs Brown today, ____he?
| A．mustn’t | B．may not | C．can’t | D．needn’t |
.I don’t believe everything goes well with you,____?
| A．do they | B．does it | C．don’t they | D．doesn’t it |
.Nobody has the right to go there to have dinne rfree,____?
| A．hasn’t it | B．has it | C．haven’t they | D．have they |
The unsold good she brough to me are useless to me,____?
| A．aren’t they | B．are they | C．did he | D．didn’t he |
Let me introduce myself to you all,____?
| A．may you | B．will you | C．won’t I | D．won’t you |