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Avian flu or H5N1 has infected more than a hundred people so far in at least ten countries. The virus in Asia is killing more than 50% of the humans infected. If this virus learns to (36) human to human and (37)that level of killing humans, we’’d got a global (38). Under (39) microscope, flu viruses look like spiky creatures. H5N1 may seem unassuming in the lab, but be sure it has ability to cause a public health (40). In fact experts say that H5N1 (41) strain responsible for the 1918 Flu pandemic. That strain mutated to (42) between people and (43). killed as many as 15 million around the world. (44). But scientists warn that H5N1 could change to become an explosive killer. (45) Here’’s what I mean. Let’’s say that the chicken farmer has the regular flu which always spreads like a wild fire from person to person. Then he gets infected with H5N1 from one of his chickens. Now both viruses are in the cells where they exchange some of their genes. That’’s called re-assortment. If they shuffle the gene just right, (46)____. And that is the biggest fear of all.

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维果茨基提出了______，指两个邻近发展阶段间的过渡状态。

第三节短文理解 2 阅读下列短文，从[A]、[B]、[C]三个选项中选择一个正确答案。 Singapore(新加坡) is the name of an island on the south of Malaya. It is also the name of the cit on the south side of this island. Singapore City is one of the world’s greatest ports. Through it pass goods from all around the world. On most of the island the climate is hot and wet. Fruits, vegetables, and rubber(橡胶) are grown wherever land can be farmed. Malaya is just above Singapore on the map. It is an important shipping center. Much of the rubber that is used in the world is from Malaya. Thick jungles (丛林) cover much of the country. On the little land they can farm, the people raise mostly rice. India is on the west of Burma(缅甸). It is the seventh largest country in the world. And it has more people than any other country except China. India has deserts(沙漠), jungles, plains and mountains. People in India speak about one hundred and eighty languages. On their farms Indians grow wheat, vegetables, rice, and other foods, but they are not able to grow enough food to feed everyone. Where is Burma

Where does Miss Li Work

A. In a school.
B. In a hospital.
C. In a restaurant.

阅读下面短文，从短文后所给的[A]、[B]、[C]三个选项中选出能填入相应空白处的最佳选项。 Mr. Reece is an interesting old main Mr. Reece worked (41) a farm. He and his wife (42) a lot of things and they had some cows. Every day they worked hard (43) morning till night. One day, Mr. Reece (44) his wife, "Let’s go to Portsmouth next Sunday. We can have a good lunch there and then we can go to the cinema." His wife was very (45) when she heard this, because they always ate a lot, and she didn’t like (46) three times a day. They went to Portsmouth (47) and walked about for an hour. Then, (48) it was twelve o’ clock, they wanted to have lunch. They looked at four restaurants. In front of one restaurant, they saw a notice. It (49) , "Lunch: 12:30 to 2:30, 1.5 pounds. " "Well, that’s great," Mr Reece said, "We can eat for two hours for 1.5 pounds here ! This is the (50) for us."

A. said to
B. told to
C. asked