—Excuse me, is this ________ new pencil sharpener?  —Yes, it’s ________. He bought it just now.

A．Tom’s; his

B．Tom; his

C．Tom’s; hers

D．Tom’s; yours

痰致病广泛，变化多端的原因是（）

A.痰可扰乱神明

B.痰可化火化风

C.痰阻碍气血运行

D.痰似风善行数变

E.痰可随气升降无处不到