-Didtheteachertellyou________nextweek?-Yes.We'llvisittheGreatWall.A

-Did the teacher tell you ________ next week?-Yes. We'll visit the Great Wall.A.to go whereB.how to doC.what to doD.to do what

C解析动词不定式可以和疑问词what，which，how，where，when等词连用，构成不定式短语，但整个句子仍为简单句。如：Do you remember how to do it?
拓展延伸：这种简单句可以还原为复合句。如：
I don't know what to do next.
→I don't know what I should do next.

就是这个解释