选择题:He cannot be tired _______ he has walked only half 题目分类:南阳师范学院-学前教育-大学英语(一) 题目类型:选择题 查看权限:VIP 题目内容: He cannot be tired _______ he has walked only half a mile. (A) :since (B) :whether (C) :when (D) :as long as 参考答案: