----What _______ the children be doing?

----They _______ be playing a game called Bingo.

A．might; can

B．can; might

C．might; might

D．can; can

便隐血试验前三天内，患者可以进食的食物有（）

A.肉类、豆制品

B.血制品、乳制品

C.豆腐、铁剂

D.动物肝脏、豆制品

E.豆制品、乳制品