慢性乙型肝炎患者合并丙型肝炎首选抗病毒药物为（）

A.α-干扰素

B.拉夫米定

C.阿地福韦

D.α-干扰素联合利巴韦林

E.单磷酸阿糖腺苷

I’m very glad to see that your vocabulary is gradually ________.

A．building up

B．turning up

C．coming up

D．waking up