You'd better write down her phone number before you ___

试题详情及答案解析

You'd better write down her phone number before you _____ it.

A．forget	B．are forgetting
C．forgot	D．will forget

答案：A

试题分析：考查动词的时态。句意：趁你还没有忘记，最好把电话号码记下来。在时间状语从句、条件状语从句和让步状语从句中，用一般现在时代替将来时，故选A项。
考点 : 考查动词的时态