【推荐1】One worry is that kids who spend a lot of time online at home are sometimes unable to ______(social) properly with other children when they are at school. (用所给词的适当形式填空)

【推荐2】Chemical fertilizers enable crops_________(grow) faster, but destroy the soil. We must maintain the balance of the soil. (所给词的适当形式填空)

【推荐3】He is always the first one________(come) to the classroom and the last one________(leave). (所给词的适当形式填空)