题目内容
（请给出正确答案）
[主观题]
My pain__________ apparent the moment I walked into the morn, for the first man I met aske
d sympathetical-ly: "Are you feeling all right？"
A. must be
B. must have been
C. had been
D. had to be
如搜索结果不匹配，请 联系老师 获取答案
A．蒸发燃烧
B．分解燃烧
C．表面燃烧
D．阴燃
