Why does the author say summer is a good time to take a long vacation from thinking _____?

A. Because a long vacation in summer helps to improve people’s mental power.
B. Because people tend to be less creative during summer
C. Because summer is a good time for outdoor activities
D. Because mental exertion in the summer heat taxes too much of people’s energy
A. Because a long vacation in summer helps to improve people’s mental power.
B. Because people tend to be less creative during summer
C. Because summer is a good time for outdoor activities
D. Because mental exertion in the summer heat taxes too much of people’s energy

【答案】