问题

Traffic conditions in Beijing________for decades. At first people only complained about jams during rush hours,but today every hour is rush hour. [ ]

A: is worsening
B: have worsened
C: have been worsening
D: worsened

正确答案是：

同类题型

t have passed this way, _____here arehis footprints.

I won the 800-meter race yesterday. ______.

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(2014·衡水中学月考)You________scold such a pupil who always keeps silent so seriously that you________hurt him.

Can’t you act like a gentleman— ________. A gentleman can’t buy the nice and cheap things among such a group of crazy women.