治疗肺热津伤之痿证，应首选

A．消渴方
B．清燥救肺汤
C．桑杏汤
D．杏苏散
E．沙参麦冬汤

Helen always helps her mother do the housework even though going to school ________ most of her day.

A．takes up

B．makes up

C．saves up

D．uses up