2019年mpacc考试英语真题——连词1177

{01}No one knows exactly ______ this important discovery was made.

A.that

B.that how

C.what

D.when

解析：考查名词性从句。when什么时候，句意：没有人确切的知道什么时候发现这个重要的发现。
本题选D。

{02}— How long is it ______ you picked up your badminton training?
— It was not until my finance became better in last December ______ I started the training.

A.before; when

B.until; that

C.that; when

D.since; that

解析：句型考查题。 第一空考查句型 it is  +段时间 +since…  “自从…多长时间”；第二空考查强调句型 it is +被强调部分+that ….
本题选D。