Question

【题目】You'd better write down her phone number before you _______ it.
A.forget
B.are forgetting
C.forgot
D.will forget

Answer 1

【答案】A
【解析】句意：你最好记下电话号码以免忘记。before引导一个表示“将来”的时间状语从句。英语的时间状语从句中不用will do.排除D项。B项表示“据安排或计划近期要做某事”；C项表示“过去”。故本题选择A项。