1. 阅读理解

    Waves (波浪) are beautiful to look at, buthuge waves are greatly harmful to ships at sea, as well as houses and buildingsnear the seaside. What causes waves? Most waves are caused by winds' blowingover the surface of the water. The sun heats the earth, causing the air to riseand the winds to blow. The winds blow across the sea, pushing little waves intobigger and bigger ones.

    The sizeof a wave is decided by how strong the wind is, how long it blows, and howlarge the body of the water is. In a smallbay, big waves will neverbuild up. But at sea the wind can build up big, powerful waves.

    It isbelieved that the height of a wave (in metres) will usually be no more thanone-tenth of the wind's speed (in kilometres). In other words, when the wind isblowing at 120 kilometers an hour, most waves will be 12 meters high or less.Of course, some waves may came together to form big waves that are much higher.

1. （1） What are huge waves greatly harmful to?

   A . Ships at sea. B . Houses in the city. C . The living things in the sea. D . Buildings in the town.
3. （2） What causes waves?

   A . Ships' pushing the water. B . The sun's heating the earth. C . Sharks' running after each other. D . Winds' blowing over the surface of the water.
5. （3） According to the passage, which statement is NOT true about the size of a wave?

   A . It's decided by how strong the wind is. B . It's decided by how long the wind blows. C . It's decided by how far the wind blows. D . It's decided by how large the body of water is.
7. （4） What does the underlined word "bay" mean in Chinese?

   A . 海湾 B . 海滩 C . 河流 D . 湖畔
9. （5） When the wind is blowing at 168 kilometres an hour, how high will most waves be?

   A . 12 metres. B . 16 metres. C . 168 metres. D . 240 metres.