Turn left and ______the street.[ ]
A. cross
B. across
C. through
D. walk
答案：A
Saving and recycling are long-term projects _______ determination matters a great deal.
A．that
B．which
C．whose
D．where
逆行肾盂造影的禁忌证是()
A． * * 狭窄
B．严重的肾结核
C．严重肾盂积水
D．先天性多囊肾
E．静脉肾盂造影显影不良
