1. 阅读短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

    Look at the following. It shows a cross-section (横截面) of a mountain and the land on each side of it. The sea is on the west side of the mountain.

    In January, February and March, warm wet winds blow strongly across the sea towards (朝) the mountain. The winds pick up moisture (湿气) as they blow across the sea. When clouds reach the mountain, they rise and become cooler. The higher they have to go, the cooler they become. The moisture in the clouds turns to rain. As a result, the clouds drop rain on the west side of the mountain. Some of the clouds pass over the mountain, but there is little rain in them.

    In July and August, strong winds blow from G towards the mountain. They pass over a wide desert, where it is always very hot. The winds become hot and dry. They rise when they meet the mountain. They do not form clouds because there is no moisture in the hot air.

    The diagram shows why there are wonderful farms on one side of the mountain, but there is a desert on the other side.

1. （1） Suppose (假设) it is in the northern part of the Earth, which season is dry?

   A . Spring. B . Winter. C . Autumn. D . Summer.
3. （2） After reading the passage, what is the most important cause of the rain?

   A . The mountain. B . The clouds. C . The sea. D . The desert.
5. （3） Why do NOT the winds from G form clouds?

   A . Because there is no moisture in the hot air. B . Because the winds don't pass over the desert. C . Because the winds are not strong enough. D . Because the winds don't reach the mountain.
7. （4） From the passage we know ________.

   A . point G is to the west of point A B . there is little rain on the east side of the mountain C . when the winds meet the mountain, they always form clouds D . the higher the clouds go, the warmer they become