"You must always remember," one said, "that the president is about six years old."

VOA: special.2010.08.12

Remember, "is it okay" must always be followed with either "if" or "to".

记住，使用“is it okay”时后面一定要跟上 "if" 或者"to"。

Is it okay 课堂 - SpeakingMax英语口语达人