The books are made _____ trees, and we can use trees in many different ways. [ ]

A. of

B. from

C. into

D. on

支气管扩张时，下列哪两个并发症最为多见（）

A.脓胸及肺脓肿

B.肺脓肿及肺纤维化

C.肺气肿及肺脓肿

D.肺源性心脏病及肺纤维化

E.脑膜炎及肾炎