2008年的资料表明，全世界每年因食管癌死亡的患者人数约为（）

A.48.2万人

B.40.7万人

C.21.1万人

D.10.7万人

E.17.6万人

—Could you tell us ______?

—About two weeks. [ ]

A. how often are we going to be away

B. how often we are going to be away

C. how long are we going to be away

D. how long we are going to be away