Sir, you should ________ at the red light, but you didn’t.
| A．stop | B．have to stop |
| C．have stopped | D．not have stopped |
The main reason is________endangered animals．
| A．to protect |
| B．protect |
| C．to protecting |
| D．protects |
Please write as________as you can．
| A．careful |
| B．care |
| C．carefully |
| D．more careful |
One fifth of the population in that country________from China．
| A．is |
| B．are |
| C．am |
| D．be |
—________is the population of the city？
—About one million．
| A．What |
| B．How many |
| C．How |
| D．How much |
China has________population in the world．
| A．the bigger |
| B．the biggest |
| C．the more |
| D．the most |