13. Would you please tell me the quickest way_______English well?
| A．to learn | B．of learning | C．how to learn | D．A or B |
In modern civilization, mankind is destroying the planet, all __________ progress.
| A．as a result of | B．in the name of | C．in a state of | D．by the side of |
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 |