Could you please ______ loudly in the library?
| A．don’t talk | B．don’t say | C．not to talk | D．not talk |
—Have you finished your homework?
—Not . There are still some exercises to be done.
A．already B．ever C．yet
About one fifth of the world population Chinese. China is a country with population in the world.
A．is; a largest B．are; the largest C．is; the largest
The doctor did everything they could the dying boy’s life, but they failed.
A．saving B．to save C．saved
I’d like to walk to the park instead of there by bus.
A．going B．goes C．to go
we were quite tired, we still went on working.
A．Because; / B．Although; but C．Although; /