Because all the roads leading to the mountain village （ ）
Because all the roads leading to the mountain village （ ）
the rescue workers were not able to reach it to help.
A.were blocked
B.are blocked
C.have been blocked
D.had been blocked
为什么用一般过去时不用现在完成时
the rescue workers were not able to reach it to help.
A.were blocked
B.are blocked
C.have been blocked
D.had been blocked
为什么用一般过去时不用现在完成时
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