Question

I took out my notebook and wrote down my teacher’s new phone number            I forgot it.

A．until	B．before
C．when	D．since

Answer 1

B

试题分析：在我忘记之前我拿出笔记本记下我老师新的电话号码。A. until直到； B. before在……之前； C. when当……时候； D. since自从，根据句意及语境此题选B。