The iron and steel industry ____ very important to our country.

The iron and steel industry ____ very important to our country.
A、are
B、is
C、be
D、were
【正确答案】：B
【题目解析】：【考点点击】本题考查主谓一致。【要点透析】当主语表示的是同一概念、同一人、同一事的时候,谓语动词用单数,这种结构的特征是and连接的两个词只有一个冠词。