【推荐2】Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

If you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors,     1     say that most of our brains are not getting enough exercise, and as a result, we     2    (grow) old unnecessarily soon.

Professor Taiju Matsuzawa wanted to find out     3     quite healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the speed of growing old     4     be slowed down.

With a team of researchers at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and different jobs. Computer technology helped the researchers to get most exact measurements of the volume of the front and side parts of the brain, which have     5     to do with intellect (智力) and feelings, and decide the human character. As we all know, the back part of the brain, which controls tasks like eating and breathing, does not contract with age.

Contraction of front and side parts — as cells die off — was seen in some people     6     their thirties, but it was still not found in some sixty and seventy-year-olds.

Matsuzawa concluded from his tests that there is a simple way     7    (prevent) the contraction — using the head.

The findings show that contraction of the brain begins     8    (soon) in people in the country than in the towns. “Those with least possibility”, says Matsuzawa, “are lawyers, followed by university professors and doctors. White collar workers     9    (do) the same work in government offices are, however, as possible to have     10    (contract) brains as the farm worker, bus driver and shop assistant.”

【推荐3】Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

How Do Avalanches Happen

If you’re ever skiing in the mountains, you’ll want to be aware of avalanches. An avalanche is a sudden flow of snow down a slope, such as a mountain. The amount of snow in an avalanche     1     (vary) based on many things, but it can be such a huge amount that it can bury the bottom of a slope in dozens of feet of snow.

Avalanches     2     be caused by natural things. For example, new snow or rain can cause built-up snow to loosen and fall down the side of a mountain. Artificial triggers（诱发因素）can also cause avalanches. For example, snowmobiles, skiers, and explosives     3     (know) to lead to avalanches.

Avalanches   usually occur   during the   winter   and spring,     4     snowfall   is   greatest.   As they are dangerous to any living beings in their path, avalanches have destroyed forests, roads, railroads and even entire towns. Warning signs exist that allow experts to predict -- and often prevent -- avalanches from     5    

   (occur). When over a foot of fresh snow falls, experts know to be on the lookout for avalanches. Explosives can be used in places     6     massive snow buildups to trigger much smaller avalanches that don’t     pose a danger to persons or property.

When deadly avalanches do occur, the moving snow can quickly reach over 80 miles per hour. Skiers caught in such avalanches can be buried under dozens of feet of snow.     7     it’s   possible to dig out   of such avalanches, not all are able to escape.

If you get tossed about by an avalanche and find yourself     8     (bury) under many feet of snow, you might not have a true sense of which way is up and which way is down. Some avalanche victims have tried to dig their way out, only to find that they were upside down and digging     9     farther under the snow rather than to the top!

Experts suggest that people caught in an avalanche try to dig around   you     10     (create) a space for air, so you can breathe more easily. Then, do your best to figure out which way is up and dig in that direction to reach the surface and signal rescuers.