巴豆的功效是

A．凉血止血、祛痰止咳
B．收敛止血、止痢杀虫
C．凉血止血、解毒敛疮
D．收敛止血、消肿生肌
E．化瘀止血、活血定痛

—Could I finish it today or tomorrow ?

—Either day is OK．Take your time．You _________ do it as you like．

A．can

B．must

C．need

D．might