Lately some scientists are experimenting ___________ white mice to ____________ this kind of medicine.
| A．on,try on | B．with, test on | C．on ,test out | D．with,carry out |
She talked again and again to her friend about careful driving, but _____ just turned a deaf ear to her words.
| A．another | B．other | C．others | D．the other |
He was told that_____10:15 flight would take them to Shanghai in time to reach Fudan University.
| A．the; / | B．the; a | C．a; the | D．/; the |
I am late, ____?
| A．aren't I | B．aren’t you | C．are you | D．am i |
We used to have a discussion, ___?
| A．did you | B．didn’t we | C．used we | D．didn't used we |
I don't think you have eaten so many crisps ,____?
| A．do I | B．haven't you | C．have you | D．don't you |