That children ______meet with setbacks is a matter of necessity as they_____, so parents don’t worry about that.A.shall; grew upB.must； grew upC.can; grow upD.will; grow up
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D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。