Much to his joy, the old man may be able to get a hardship _____ from the government,   which covers his expense.

A．insurance

B．allowance

C．competence

D．circumstance

我国成人白血病最常见的是 （）

A.急性淋巴细胞白血病

B.急性髓细胞性白血病

C.慢性髓性白血病

D.毛细胞白血病

E.慢性淋巴细胞白血病