— There are still many old city walls in Xi’an, _______?
—Yes, there are.
| A．are there | B．aren’t there |
| C．are they | D．aren’t they |
After the examination,the doctor asked the man to give up ______.
| A．smoke | B．in smoking | C．to smoke | D．smoking |
We met him at _____ very nice hotel .______ hotel is in the city center.
| A． a,A | B． a,The | C． The,The | D． The,A |
----We have a lot of cakes here.Help _____ to some more ,kids.
----Thank you.
| A．yourselves | B．you | C．your own | D．yourself |
Billy is so tired _____ he worked all night in his office.
| A．when | B．because | C．if | D．so |
We must stop _____down trees if we don’t want a world without them.
| A．cut | B．to cut | C．cutting | D．cuts |