It isn’t quite ___ whether the Tibetan antelope is still being hunted.
| A．certain | B．sure | C．safe | D．careful |
--Why not take some medicine ?
---Yes, I do.I have taken medicine for a whole week, but it doesn't seem to ____.
| A．work | B．use | C．make | D．get |
--Tom failed again in the driving test.
---Why not?Tom is ____ but a fool in driving.
| A．nothing | B．anything | C．something | D．everythin |
___ I agree with most of what you said, I don't agree with all.
| A．Since | B．While | C．As | D．When |
___ a lot of work to do, all the workers are not allowed to take their holidays.
| A．Because | B．For | C．Since | D．With |
I’m taller than Mike ___ head.
| A．to a | B．by a | C．for the | D．in the |