Question

The students asked _________________

1. A.
   when can they surf the Internet in class
2. B.
   when could they surf the Internet in class
3. C.
   when they could surf the Internet in class
4. D.
   when they can surf the Internet in class

Answer 1

C
考查時(shí)態(tài)和賓語從句的語序。所有的名詞性從句都使用陳述語序，排除AB；asked是過去時(shí)，后面的賓語從句也應(yīng)該使用過去時(shí)。