Question

It was _____back home after the experiments.

A．not until midnight did he go	B．until midnight that he didn’t go
C．not until midnight that he went	D．until midnight when he didn’t go

Answer 1

C

考查not until的强调句。 not until的强调句必须写成it was/is not until +陈述语序。所以排除A,B,D, “直到半夜实验后他才回家。”