There was an accident in this street this morning and ______ there has been a se

游客2023-11-11 25

问题 There was an accident in this street this morning and ______ there has been a severe congestion of traffic.

选项 A、until that
B、since then
C、for which
D、after that

答案 B

解析根据从句中用完成时has been来看，应该选择since then。

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