语法与词汇
9.
Televisions enable us to see things happen almost at the exact moment_____.
A、
which they are happening
B、
they are happening
C、
which they happen
D、
they have happened
【正确答案】
B
【答案解析】
moment后接的是省略关系副词when的定语从句。B符合题意要求。
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