——What about sightseeing this weekend ?—— That sounds interesting!A. go B. to go C. going

问题补充：

——What about sightseeing this weekend ?

—— That sounds interesting!

A. go B. to go C. going

答案：

解析：根据about是介词，后面应该跟动名词可知，本句应该用going，本句的意思是“这个周末去观光怎样？”所以本题选C。