—Where is your brother?

—He _____ in the next room.[ ]

A. cooks

B. cooking

C. is cooking

D. are cooking

白血病联合化疗时应注意哪些（）

A.密切随访周围血象

B.积极防治感染

C.当粒细胞＜1.5×10⁹/L时应停止化疗

D.注意碱化尿液

E.明显贫血时可输血