When I was walking past his room yesterday evening．I heard him ____the piano ．
| A．playing | B．to play |
| C．played | D．play |
________the population of China?
| A．What’s | B．What | C．How is | D．How many |
Plane will be very large _______ flying will be very cheap.
| A．and | B．so | C．but | D．or |
There _______ an English party this weekend.
| A．is | B．are | C．is going to be | D．is going to have |
They are looking forward to _______Beijing.
| A．visit | B．visited | C．visits | D．visiting |
I’m standing on the Great Wall of China and talking _______ you.
| A．in | B．on | C．to | D．for |