it was not until he arrived home

Question

It was not until __arrived home that he remembered his appointment with the lawyer.
A.he B.he had
请问选什么
我记得有个句型是It was not until sb did sth.that sb did sth.

Answer 1

这句是强调句,强调时间,补充完整应该是：
It was not until （B.he had） arrived home that he remembered his appointment with the lawyer.
她到了家才想起他和律师的约会.

Answer 2

until 与not until的用法区别！