Only when it rains in summer_______ such beautiful rainbows here.
| A．could you see | B．you can see |
| C．you will see | D．can you see |
With the project of animal protection, foxes are becoming more ________ in urban areas.
| A．popular | B．ordinary | C．universal | D．widespread |
Food safety is ________ important, so the government spares no efforts to prevent food pollution.
| A．strongly | B．reasonably | C．highly | D．naturally |
Don’t be so discouraged. If you ________ such feelings, you will do better next time.
| A．carry on | B．get back | C．break down | D．put away |
Modern forms of transportation and communication have done much to ________the isolation of life in Alaska.
| A．break through | B．break down | C．break into | D．break out |
There was a big hole in the road which ________ the traffic.
| A．took up | B．brought back、 |
| C．kept back | D．held up |