Bothofthesemedicines
问题详情:Bothofthesemedicines_________beneficialtomankindsincetheywereinvented. A.havebeenproved B.proved C.haveproved D.areproved【回答】C知识点:现在完成时及其被动式...
问题详情:Bothofthesemedicines_________beneficialtomankindsincetheywereinvented. A.havebeenproved B.proved C.haveproved D.areproved【回答】C知识点:现在完成时及其被动式...