单选题Thestudentsasked_________________A.wh

单选题 The students asked _________________A.when can they surf the Internet in classB.when could they surf the Internet in classC.when they could surf the Internet in classD.when they can surf the Internet in class

C解析考查时态和宾语从句的语序。所有的名词性从句都使用陈述语序，排除AB；asked是过去时，后面的宾语从句也应该使用过去时。

这个问题的回答的对