The number of teachers in our school _____ greatly increased last term. A number of teachers in this

school _____ from the countryside.[ ]

A. was; is        

B. was; are    

C. were; are        

D. were; is

干扰铜吸收的膳食成分除外（）。

A.钙

B.蔗糖和果糖

C.钼

D.铁

E.维生素C