049.
Many rules govern drivers on American streets and highways. The most common ones are the speed limit. The speed limit regulates how fast a car may go. On street in the city, the speed limit is usually 25 or 35 miles per hour. On highways between cities, the speed limit is usually 55 miles per hour. When people drive faster than the speed limit, a policeman can stop them. The policeman gives them pieces of paper which people call traffic tickets. Traffic tickets tell the drivers how much money they must pay. When drivers receive too many tickets, they probably cannot drive for a while.
The rush hour is when people are going to work or going home from work. At rush hour there are many cars on the streets and traffic moves very slowly. Nearly all American cities have rush hours.
Drivers do not get tickets very often for speeding during the rush hours because they cannot drive fast.

正確答案：
(1) 正確答案為C。根據On highways between cities, the speed limit is usually 55 miles per hour. 高速公路上的限速是每小時55英里。因此可知C項正確。
(2) 正確答案為C。根據Traffic tickets tell the drivers how much money they must pay. 罰單上寫明司機要交多少罰款。可知C項正確。
(3) 正確答案為C。根據When drivers receive too many tickets, they probably cannot drive for a while.司機要是收到了太多罰單，他們就有一段時間不能開車了。因此可知C項正確。
(4) 正確答案為A。根據At rush hour there are many cars on the streets and traffic moves very slowly. 在高峰期，路上有許多車，車輛緩慢前行。可知，在高峰期時會出現交通擁堵，因此A項正確。