----Has your uncle come back from England for a summer holiday?--Yes. But he at home f

问题补充：

----Has your uncle come back from England for a summer holiday?

----Yes. But he at home for only a few days. Now he has been back to London.

A. stayed

B. has stayed

C. had stayed

D. is staying

答案：

(答案→)A. stayed

B. has stayed

C. had stayed

D. is staying

解析：句意：你叔叔从英国回来过暑假了吗？--是，但是他呆在家里几天，现在已经回到伦敦了。从Now he has been back to London.，可知在家里待几天是过去的事情，用一般过去式，选A。