There ________ lots of trees on both sides of this street.But now they are all gone.

A．used to have

B．are used to be

C．used to be

D．are used to have

治疗肾病综合征时，激素疗效差的指标是（）

A.大量蛋白尿

B.高度水肿

C.有肾性糖尿和（或）氨基酸尿

D.严重低蛋白血症

E.青少年患者