【单选题】Somepeoplearesittingonthegrass;othersarestr ollingalongthelakeside,______.A、chattingandtolaughB、tochatandtolaughC、chattingandlaughingD、chattingandlaughed
【单选题】Somepeoplearesittingonthegrass;othersarestr ollingalongthelakeside,______.A、chattingandtolaughB、tochatandtolaughC、chattingandlaughingD、chattingandlaughed



