There ______ many people ______ in the office, but now nobody is allowed to.

A．used to be；smoking

B．used to have；smoking

C．used to be；smoke

D．used to have；smoke

在死因顺位中逐渐上升的癌症是（）.

A.白血病

B.鼻咽癌

C.食管癌

D.宫颈癌

E.胃癌