问题
选择题
The roads have ______ because of people’s dependence on cars.
A．jammed
B．been jamming
C．to jam
D．been jammed
答案
答案：D
考查语态。句意：公路变得拥挤了，因为人们对汽车的依赖。可知公路是被堵塞的对象，故用被动语态选D。
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The roads have ______ because of people’s dependence on cars.
A．jammed
B．been jamming
C．to jam
D．been jammed
答案：D
考查语态。句意：公路变得拥挤了，因为人们对汽车的依赖。可知公路是被堵塞的对象，故用被动语态选D。