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Look at the diagram（圖表）below．It shows a cross—section（橫截面）of a mountain and the land on each side of it．The sea is on the west side of the mountain．

In January，F(xiàn)ebruary and March，warm wet winds blow strongly across the sea towards the mountain．The winds pick up moisture（濕氣）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，which sometime has problems with flooding．Some of the clouds pass over the mountain but there is little rain in them．

    In July and August，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（in many counties）there are profitable（有益的）farms on the side of a range of mountains but there is a desert on the other side．

根據(jù)短文內(nèi)容，選擇正確答案。

1．Suppose it is in the northern part of the earth，which season is dry?

      A．Spring    B．Summer    C．Autumn   D．Winter

2．Which part in the diagram is good for farming?

      A．A to B    B．C to D

      C．E to F     D．F to G

3．After reading the passage and the diagram，what is the most important cause of the rain?

      A．The sea      B．The clouds

      C．The mountain  D．The desert

4．Why don’t the winds from G form clouds?

      A．Because the winds are not strong enough．

      B．Because the winds don’t pass over the desert．

      C．Because there is no moisture in the hot air．

D．Because the winds don’t reach the mountain．

5．Which of the following statements is TRUE?

      A．There are no clouds passing over the mountain．

      B．Point G is to the west of point A．

      C．When the winds meet the mountain，they always form clouds．

      D．The higher the clouds go，the cooler they become．