Question

Although the teacher had told Bob the history of telephone, Bob didn’t know when ____.

A．it was invent

B．was it invented

C．it was invented

D．it invented

Answer 1

C

考查賓語從句和被動(dòng)語態(tài)。句意為：盡管老師給鮑勃講了電話的歷史，但他還是不知道電話是什么時(shí)候發(fā)明的。首先，賓語從句要用陳述句的語序，即：連接詞+主語+謂語+其他，所以B不對；另外，it（電話）是invent（發(fā)明）的承受者，所以要用被動(dòng)語態(tài)（be+過去分詞）。故選C。