急性支气管炎患儿，咳嗽频作，咽痒声重，咳痰稀薄，苔薄白，脉浮紧。其证型是()

A.风热咳嗽

B.风寒咳嗽

C.痰热咳嗽

D.阴虚咳嗽

E.痰湿咳嗽

At the beginning of class, the noise of desks _______ could be heard outside the classroom.  [ ]

A. opened and closed

B. to be opened and closed   

C. being opened and closed

D. to open and close