After I _____ my homework, I went out to an aquarium.[ ]

A. was doing

B. did

C. does

D. would do

咳血方的功用是（）

A.清肝宁肺，凉血止血

B.化痰止咳，凉血止血

C.凉血止血，利尿通淋

D.凉血止血，降气化痰

E.止咳平喘，凉血止血