钩端螺旋体保菌和带菌的动物很多，其中，最主要的是（）

A.狗和羊

B.狗和猪

C.鼠和猪

D.狗和牛

E.狗和鼠

---Dad, I am too tired and feel too much pressure on my mind

---Come on! That’s the life of Senior Three, but if you are admitted to a key University, you ____get an Iphone 5s as a gift.

A．must

B．shall

C．will

D．might