________ the whole society care for children as well as their parents, children can grow healthily and happily
A.As soon as
B.Once
C.The moment
D.So long as
答案:D
考查状语从句连词的选用。句意为“只要社会和家庭共同关心青少年,他们就能健康幸福地成长。”,空格处应表达“只要”之意。So/As long as强调某事的发生以另一事件的发生为前提,而once既表时间,又包含条件,译作一旦。A和C表示时间的顺延。