Televisions enable us to see things occur almost the moment ____.
A.when they are happening
B.they are happening
D.they have happened(答案)
C.which they happen
此题实际考查时态。在时间从句中,用一般现在时表示将来发生的动作,用现在完成时表示将来业已完成的动作,故选择完成时。本句也可使用一般现在时。
the moment = as soon as,原句可以说:
Televisions enable us to see things occur almost as soon as hey have happened.