【題目】Thousands of protesters _______ major roads in the central business area of the city for weeks, leading to much inconvenience for many Hong Kong citizens.

A. knocked off B. blocked off

C. knocked out D. blocked out

【答案】B

【解析】

試題分析： 句意：成千上萬(wàn)的抗議者堵塞了城市商業(yè)中心的主干道，給許多香港市民帶來(lái)了很多不便。block off “(用路障)封鎖，堵住”，符合句意。knock off“停止某事”；knock out “使昏睡”；blocked out“遮�。ü饩�或聲音）”。故選B項(xiàng)。

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