Question

 (2011年日照市调研考试)I don’t know how many years ago________people began to stay at home and civilization began.

A．it was when                  B．it was that

C．was it that                    D．was it when

Answer 1

解析：选B。考查强调句型。句意：我不知道是多少年前人们开始呆在家中，文明由此开始。此句中被强调部分是how many years ago，去掉it was...that之后句子的正常语序是I don’t know how many years ago people began to stay at home and civilization began.。