1 . 我迫不及待地想知道他在说什么(what引导的宾语从句)
I can’t wait to know ______________________________.

2 . 众所周知,没有人能轻易成功,所以我们必须努力学习。(定语从句)
______, no one can succeed easily, so we must study hard.

3 . 警察加强了对三天前失踪的那个男孩的搜寻工作。
The police have stepped ____________ their search for the boy ____________ went missing three days ago.

4 . 警察搜查了事故发生的那幢房子。
The police searched the house ____________ the accident had ____________ .