Weather has a great influence（影响）on people． It influences people's health， intelligence（智力）and feelings．
In August， it is very hot and wet in the southern part of the United States． People there have heart disease and other kinds of health problems during this month． In the Northeast and Middle West， it is very hot at some times and very cold at other times． People in these places may have heart disease after the weather changes in February or March．
The weather can also influence intelligence． For example， a study by scientists， the IQ scores of a group of students were very high during a storm， but after the storm their IQ scores were lower than usual level． So storms can increase intelligence． However， very hot weather can lower it． Students in the United States often do badly in exams in the hot months of the year．
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 and they may feel unhappy during cold weather． In hot summer weather， on the other hand， fat people may feel unhappy． The summer heat may make them tired and they are easy to get angry．

(1) ______ can increase students' IQ by a study．

A. Shower

B. Cloudy days

C. Storms

D. Sunshine

(2) Students in the U．S． usually do badly in exams in ______ ．

A. December

B. August

C. April

D. January

(3) If thin people feel unhappy， the weather may be very ______ ．

A. cold

B. warm

C. hot

D. cool

(4) Which is NOT TRUE according to the passage？ ______

A. Fat people don't like summer．

B. People may have heart disease because of hot weather．

C. Some people have health problems because the weather changes．

D. Bad weather always causes problems on people's intelligence．