--Dad I want to go out for dinner with my friends tonight.Keep in mind you have to be

问题补充：

--Dad, I want to go out for dinner with my friends tonight.

--Keep in mind you have to be home by 9:00.

A. that

B. where

C. what

D. when

答案：

(答案→)A. that

B. where

C. what

D. when

解析：句意：--爸爸，我想今天晚上和朋友去吃晚饭。--记住你得在9点前回家。Keep in mind后面是宾语从句，宾语从句中不缺成分，用that连接宾语从句，that不做成分，只是起到连接的作用，所以选A。