1. 阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项。

    The undersea world is very beautiful. Now more and more people want to dive in the sea to find the secrets there.

    There are many strange animals in the sea. Some are as large as a school bus. Many sea animals give out light in the dark. Many fish have no eyes while some have big eyes. A few have eyes on one side of their heads.

    During the day, there is enough light. Everything under the sea looks green and blue. But the deep sea is not an easy place to stay in. So you must be very careful when you dive in deep water. It's cold, and it's dark too. The deeper it is, the less sunlight there is. At about 3,000 feet deep, there is no light at all.

    Besides the cold and the darkness, deep-sea animals face a third danger-other animals! They must find food to eat. Many animals eat plants. However, some animals eat meat. This means these sea animals have two big jobs. They need to find animals as food, and they have to try not to become other animals' meal.

1. （1） According to the passage, people want to dive in the sea because _______.

   A . diving is cheap and interesting B . they want to catch fish from the undersea world C . they want to find the secrets of the undersea world D . the undersea world is very dark
3. （2） How many dangers do the animals in the deep sea face according to the passage?

   A . One. B . Two. C . Three. D . Four.
5. （3） Which of the following is TRUE according to the passage?

   A . In the daytime, everything under the sea looks yellow. B . The deep sea is not an easy place to stay in. C . Fish under the deep sea all have eyes. D . The deeper it is, the more sunlight there is in the sea.
7. （4） The passage is mainly to _______.

   A . tell us about some deep-sea animals B . remind us about safety in the sea C . ask us to help protect the sea D . introduce the undersea world