问题补充：
---Let’s go hiking staying at home, shall we?
---A good idea.
A. as well as
B. in order to
C. instead of
D. in addition to
答案：
A. as well as
B. in order to
(答案→)C. instead of
D. in addition to
解析：as well as也，和……一样； in order to为了，以便；instead of代替，而不是；in addition to除……之外，另外。句意：让我们去徒步旅行而不是呆在家里，好吗？——好主意。结合语境可知选C。
