麻烦讲下英语单选.谢谢!televisions enable us to see things happen almost at _英语解答

麻烦讲下英语单选.谢谢!
televisions enable us to see things happen almost at the exact moment__.
A.which they are happenin
B.when they are happening
C.which they happen
D.they have happened

人气：120 ℃　时间：2020-08-06 14:58:58

解答

答案为 B.完整的句意：电视机能让我们几乎在事件发生的时刻看到事件发生的情况.
A C 中which和they不可能同时做主语
D没有分句的连接词
B句中when引导的分句做同位语,详细说明“在那一时刻”