_________ the problem of land erosion getting more serious, the government is searching for a way to deal with it.
| A．As | B．With | C．When | D．Because |
—They are quiet, aren’t they?
—Yes. They are accustomed ______ at meals.
| A．to talk | B．to not talk | C．to talking | D．to not talking |
Thank you for all your hard work last week. I don’t think we ______ it w
ithout you.
| A．can manage | B．could have managed |
| C．could manage | D．can have managed |
For many cities in the world, there is no room to spread our further, ____ New York is an example.
| A．for which | B．in which | C．of which | D．from which |
____ well prepared you are , you still need a lot of luck in mountain climbing.
| A．However | B．Whatever | C．No matter | D．Although |
In many places in China, bicycle is still poplar means of transportation.
| A．a; the | B．/; a | C．the; a | D．the; the |