题干
--- What it be?
--- It be a man, for it is not moving. It be a dustbin, I think.
--- It be a man, for it is not moving. It be a dustbin, I think.
A：can, may, must
B：can, can’t, must
C：can, must, ca
D：may, may not, could
答案(点此获取答案解析）
B
