【问题】 He cannot be tired _______ he has walked only half a mile. (A):since(B):whether(C):when(D):as long as

He cannot be tired _______ he has walked only half a mile. (A):since(B):whether(C):when(D):as long as

正确答案:A

题目解析:本题出自新疆工程学院,新疆工程学院大学英语3,由丰阳塔题库搜集整理。