The northern parts of the United States get very cold in the win

The northern parts of the United States get very cold in the winter.It snows a great deal and the?temperature often goes_____21_____zero degree in January,_____22_____and March.But the northeastern and?northcentral regions of____23______have been financial and industrial centers,and they are heavily polluted. In recent years,people in these regions have begun to take vacations_____24_____these cold winter?months.They go to southern parts of the country____25______it is warmer.Many go to Florida where the?weather is_____26_____.Others go to the southwestern states of Arizona,New Mexico and Texas where they._____27_____dry desert climates. It has become_____28_____nowadays.for old people to move south to these places_____29_____they?retire.Typically these people sell their houses in their home communities and move south to begin a?new life_____30_____senior citizens. Their children likely have homes_____31_____and many of them are moving south_____32_____communities?where they were_____33_____.The southern and southwestern parts of the country are now growing_____34_____any?other part.Business and industry_____35_____many offices and factories in the south.California is already?the most popular state in the country. 第（21）题答案
A、below
B、above
C、near
D、over
【正确答案】：A
【题目解析】：在第21题中，句子提到“the temperature often goes_____21_____zero degree in January, February, and March”，意思是在一月、二月和三月，气温经常降到零度以下。这里需要表达的是温度低于零度，因此选项A "below" 是正确的选择。选项B "above" 表示高于，选项C "near" 表示接近，选项D "over" 表示在……之上，都不符合句子的意思。因此，答案是A。