—What about something to drink?
—____
| A．Not at all. | B．That’s right. |
| C．All right. | D．You are welcome. |
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; /
—I’ll return the book to Mary, but I can’t find her anywhere.
—She the teachers’ office. You can find her there.
A．have gone to B．has gone to C．has been to