There are 51 students in Class Three, _____ failed in the test．
| A．all of which | B．all of them | C．none of whom | D．none of them |
Recently our government policymakers are very about the rapidly rising food costs.
| A．upset |
| B．confused |
| C．concerned |
| D．conscious |
The old couple often take a walk after supper in the park with their pet dog _____them.
| A．to follow |
| B．following |
| C．followed |
| D．follows |
Yao Ming is very famous now. However, his basketball career only after many years of hard work.
| A．took on |
| B．took off |
| C．took up |
| D．took out |
——What about the protection?
——Let us keep the surface dirt by putting a cover over it.
| A．far from |
| B．free from |
| C．apart from |
| D．away from |
China is a large country, which 9,600,000 square kilometers.
| A．cover |
| B．covering |
| C．covered |
| D．covers |