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题目内容
（河南财经政法大学-金融学-大学英语4）
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
A.which they are happening
B.they are happening
C.which they happen
D.they have happened
参考答案