_____ by the advances in technology, many farmers have set up wind farms on their land.
| A．Being encouraged | B．Encouraging |
| C．Encouraged | D．Having encouraged |
Tommy, you____ be hooked on the Internet all day. You may fall behind others in study.
| A．mustn’t | B．shan’t | C．can’t | D．needn’t |
— Did you happen to hear the recent news?
—Yes, Alice ____ the entrance examination, which I find hard to believe．
| A．fails | B．had failed | C．failed | D．will fail |
I had planned for the housecloser to a river, but I was told there was a danger of flooding.
| A．built | B．to be built | C．being built | D．be built |
—Must I turn off the gas after cooking?
—Of course, you can never be ____careful with that．
| A．enough | B．very | C．so | D．Too |
My mother is always warning me when I go out, “Don’t get off the bus ____it is stopping.”
| A．until | B．before | C．while | D．After |