求详解几道英语单选题 谢谢
我手头有正确答案
重要的是 请帮忙的朋友附上解释 感激不尽!
1.several had passed___the puzzled travelers came to understand what was going on.
A. after B. whenC. before D. until
2. ___is always the case, the darkest hour comes before the dawn.
A. ThatB. ItC.AsD. What
3. Bob said proudly that he had achieved all his goals, not in spite of his handicap, but ___it.
A. owing toB. due toC. because of D. on account of
3. A. owing toB. due toC. because of
这道题选的Because of。
不解的是 这几个不是都表示“因为”吗？ 为什么只能选C？