(1/2)Happy birthday,Alice!so you have ( ) 21 already.A become B tur

问题描述:

(1/2)Happy birthday,Alice!so you have ( ) 21 already.A become B tur

turn 有一个意思是达到;超过,越过,逾(一定年龄、数量等):所以turn 21表示满21岁.这个是固定的用法.