my son said "I don't want to go to school "and,after_ seemed a long time,he burst out cring

问题描述:

my son said "I don't want to go to school "and,after_ seemed a long time,he burst out cring
A.what B.that C.when Dwhich 选哪个,请说明理由,:)

A,这是介宾短语,且有这样的一种说法,WHAT引导双成成分的缺失.after后面缺宾语,seemed前面缺主语,固选择WHAT