How about ?
A. to go out for a walk
B. go swimming in the river
C. visiting the sick children in the hospital
D. to having lunch in the restaurant
网友回答
A. to go out for a walk
B. go swimming in the river
(答案→)C. visiting the sick children in the hospital
D. to having lunch in the restaurant
解析：可联系答.案.网客服索取。