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。
