——There'll be billions of people to watch the Spring Festival gala on TV tonight.

——I know.  The whole world______．It's a really wonderful event.

A． watches

B． is watching

C． has watched

D． will be watching

治疗贫血的关键（）

A.去除病因

B.加强护理、预防感染、注意饮食质量和搭配

C.针对病因选择有效的药物治疗

D.输血疗法

E.治疗并发症