五百基础词汇的使用和练习（4）

New Words:

vapor
eliminate
villain
dense
utilize
humid
theory
descend
circulate
enormous
predict
vanish


Read the following story to see how the new words are used it it.

Fog, tiny droplets of water vapor, is the villain of the airports. In an effort to eliminate dense fog from airports, weathermen utilize giant fans, nylon strings, and chemicals dropped from planes or shot upwards from strange machines on the ground. Nothing works as well, though, as a new weapon in the fight against fog: the helicopter. Researchers believe that if warm dry air above the fog could somehow be driven down into the humid blanket of fog, the droplets would evaporate, thus clearing the air. In a recent experiment to test their theory the researchers had a helicopter descend into the fog above barely visible Smith Mountain Airport near Roanoke, Virginia. The blades of the helicopter caused the air to circulate downwards and an enormous hole in the clouds opened above the airport. Weathermen predict that with larger, more expensive helicopters they will be able to make the thickest fog vanish.


Place one of the new words in each of the blanks below.

1.If we have one more hot. ___________ day. you will be able to persuade me to move to Alaska.

2.In the show the magician waved his wand to make a lady ____________ .

3.The hair on his head was so ___________ , a special pair of scissors was used to thin it.

4.Since he has passed all his subjects, I'll ___________ that he will graduate.

5.The __________ in the movie was played by an actor who was able to look mean.

6. _________ rose out of the valve on top of the steam engine.

7.The basketball player was ___________ : he could practically drop the ball through the hoop.

8.What ___________ can you suggest to explain the frequent changes in women's clothing?

9.Why don't you ___________ all the space on that page?

10.Sooner or later the elevator will __________ and we'll be able to go up.

11.I heard a doctor on a television show say that if we ____________ one slice of bread each day, we'll lose weight.

12.Copies of some magazines are so scarce, the librarian won't allow them to ____________ .