It was only when I read his novel once again recently ____ I came to realize ..

问题描述:

It was only when I read his novel once again recently ____ I came to realize ..
It was only when I read his novel once again recently ____ I came to realize the effect it ___ on the young generation
a.until; put b.that; had c.then; made d.did; has
选B,为什么?that在句中起什么作用?引导什么从句

It was ...that ...是强调句 不是从句.
顺流的:
I came to realize the effect only when I read this novel on the young generation once again recently.
强调的是 only when I read his novel once again recently