— I went to work on foot yesterday, though it _______ cats and dogs.

— You _______ by bus. It was easy for you to get a cold.

A．is raining; must have gone

B．rained; would go

C．have rained; could have gone

D．was raining; should have gone

患儿，13个月。血常规：血红蛋白50g/L，红细胞2.5×10/L。此患儿的贫血程度为()

A．正常血象

B．轻度贫血

C．中度贫血

D．重度贫血

E．极重度贫血