对左肾的描述，错误的是（）。

A.上端平第11胸椎

B.下端平第3腰椎

C.第12肋斜过左肾后面的中部

D.右肾低于左肾1～2cm

E.左肾门平对第1腰椎

I felt it hard to keep up with my classmates. But when ever l want to________, my teacher always

encourages me to work harder.[ ]

A. go on                

B. give up

C. run away              

D. give back