铁锈色痰最常见于（）

A.肺泡癌

B.支原体肺炎

C.急性肺脓肿

D.肺炎球菌肺炎

E.急性支气管炎

My study of biology has ______ much of my spare time, but it has given me a great deal of enjoyment.

A．taken off

B．taken down

C．taken up

D．taken away