That children meet with setbacks is a matter of necessity as they , so parents don’t worry about that.
A. shall; grew up
B. must； grew up
C. can; grow up
D. will; grow up
网友回答
A. shall; grew up
B. must； grew up
C. can; grow up
(答案→)D. will; grow up
解析：考查情态动词和时态。 will 表示“不可避免性”。如：Boys will be boys. 句中的don’t worry说明了该句用一般现在时。