The wire was found broken. And , there happened to be no one getting near.
A. therefore
B. however
C. otherwise
D. fortunately
网友回答
A. therefore
B. however
C. otherwise
(答案→)D. fortunately
解析：副词辨析。A因此；B然而；C否则，要不然；D幸运地是；句意：这个电线被发现断了。幸运地是，碰巧周围没有人在。故 D正确。