About 71% of the earth’s surface ______ covered with water, but 20% of the world population ______ have access to safe drinking water.
| A．is; doesn’t | B．are; don’t | C．are; doesn’t | D．is; don’t |
The popular star stood there,_______by many students.
| A．surrounded |
| B．surrounding |
| C．to surround |
| D．surround |
You'll feel much better if you_______ the pills.
| A．take |
| B．drink |
| C．eat |
| D．get |
Tell your friend not to take the pills _______ he may have health problems in the future, _______ it is too late.
| A．cause; which |
| B．that; when |
| C．because; when |
| D．that; which |
Actually,I don't mind_______by a young doctor.
| A．operating |
| B．operating on |
| C．being operated |
| D．being operated on |
She went to the USA and _______ ever since.
| A．hasn't been heard of |
| B．was not heard of |
| C．hadn't been heard of |
| D．isn't heard of |