Question

Lets go to a place--- we can make a round,trip in one day? What about one--- we can climb and swim

A to which where
B where where
我选的B，答案是A
谢谢啦

Answer 1

make a round trip to +地点，意思是到某处往返旅程，注意介词to不能少，所以第一空填to which，第二空楼主应该知道了吧，定语从句这里表示地点，所以填where。

祝楼主进步！