引起医院内获得性肺炎的微生物最多见于（）

A.肺炎衣原体

B.铜绿假单胞菌

C.肺炎链球菌

D.肺炎克雷伯菌

E.肺炎支原体

On April Fool's Day,  you should be careful not to be ________ when others try to play tricks on you.[ ]

A. taken up  

B. taken down

C. taken out  

D. taken in