Could you tell me ( )the radio with out any help?

题目

Could you tell me ( )the radio with out any help?
A: how did he mend B:what did he mend C:haw he mended D:what he mended
答案是哪个?为什么?

答案

C（how he mended）
译为：你能告诉我,他是怎样在没有任何援助的情况下修好这台收音机的吗?
B和D：mend后面的宾语是the radio,用what的话,what在句子中不属于任何句子成分,因此B和D是错误的
而A：因为前面有could you tell me,因此后面引导的宾语从句（他是怎样在没有任何援助的情况下修好这台收音机的）需改变句式.