Question

【题目】We don't know the love of our parents _______ we become parents ourselves one day.

A. until

B. after

C. when

D. since

Answer 1

【答案】A

【解析】句意：直到有一天我们成为父母，才知道父母的爱。本题考查连词。A. until到…为止，在…以前; 直到…才;B. after在…以后;C. when当···时候；D. since自从; 从…以来;

Not until 直到···才···；不到···不···，是固定搭配，故选A。