小题1: Let   try, and I will understand. (I)

小题2: I have met many kind teachers in the past three years. I think I am a   girl. (luck)

小题3:Life to everyone is only     , we shouldn't waste time. ( one )

小题4:Give up  ! It's bad for your health. (smoke)   

小题5:Li Na is one of the best tennis     in the world. （play)

患者，男性，16岁，因头痛、眼睑水肿和下肢轻度凹陷性水肿、尿少住院治疗。查体：血压180/100mmHg；尿常规：蛋白（++），可见管型，红细胞（+）。临床诊断：急性肾小球肾炎。

急性肾小球肾炎急性少尿期，每天钠摄入量应控制在（）。

A.<500mg

B.<1000mg

C.<3000mg

D.<5000mg

E.<6000mg