题目内容：

    Weather has a strong effect（影响）on people. It influences health，intelligence（智力）and feelings.

In August，it is very hot and wet in the southern part of the United States. People there easily have heart trouble and other kinds of health problems during this month. In the Northeast and the Middle West，it is very hot at some times and very cold at other times. Some people in those states will have heart trouble after the weather changes in February or March.

The weather can also influence intelligence. For example，in a 1983 study by scientists，the IQ scores of some college students were very high during a storm，but after the storm，their scores were low. Storms can increase intelligence. Very hot weather，on the other hand，can lower it. Students in many schools of the United States often do badly in exams in the hot months of the year（July and August）.

Weather also has a strong influence on people's feelings. Winter may be a bad time for thin people. They usually feel cold during these months. They might feel depressed during cold weather. In hot summer weather，on the other hand，fat people may feel unhappy. There is a "perfect weather" for people's work and health. People feel best at a temperature of about 18℃.

Are you feeling sick，sad，tired，forgetful，or very intelligent today？The weather may be the reason.

1.What can cause problems on health？

A. Hot and wet weather B. A strong wind C. Warm weather D. Low air pressure

2.Intelligence may be lower _______.

A. during a storm B. when it is sunny C. on a very hot day D. when you take an exam

3.The underlined word“depressed”in the fourth paragraph means _______.

A. 兴奋的 B. 愉快的 C. 忧郁的 D. 担心的

4.In“perfect weather”，_________.

A. both the fat and the thin are healthy B. the students do very well in exams

C. the air pressure is low D. the temperature is about18℃

5.What's the passage mainly talking about？

A. How weather causes health problems

B. Weather makes people feel bad

C. Weather influences feelings

D. Weather influences health，intelligence and feelings.