问题
选择题
---Why does Maria look so tired?
---She missed our school bus, ______she had to walk here all the way.
A．or
B．so
C．but
D．and
答案
答案：B
题目分析：句意：玛丽亚为什么看起来这么疲倦？因为她错过了校车，她不得不走到这里。she had to walk here all the way是she missed our school bus产生的结果，所以选B。