When was it______ he found ______ he thought was the correct way to solve the proble
问题描述:
When was it______ he found ______ he thought was the correct way to solve the proble
When was it______ he found ______ he thought was the correct way to solve the problem?
A.that; what
B.that; that
C.when; what
D.when; that
答
选A,第一空为定语从句,代后面这句话(可省略)第二空为宾语从句,做found的宾语,应为what