Later, the chance to enter _____ came and he took it.

A．into college

B．to college

C．into the college

D．college

下列是慢性支气管炎咳痰的特点，但除外（）。

A.多为白色粘痰

B.偶有痰中带血

C.可为浆液泡沫痰

D.晨间咳嗽较轻

E.伴有细菌感染时为粘液脓痰