— _____ people are taking action to protect the environment now.

— Yes. _____ of my classmates come to school by bike now. [ ]

A. More and more, Four fifth

B. Less and less, Four fifth

C. More and more, Four fifths

D. Less and less, Four fifths

易于引起高钙血症的肺癌是（）。

A.类癌

B.腺癌

C.燕麦细胞癌

D.鳞癌

E.大细胞癌