— You always spend only a little time on your study. You really ____       me down.

— I’m sorry, Mum. I won’t do that again.

A．take

B．let

C．put

D．look

X线上显示胫骨向前过度移位常提示（）。

A.前交叉韧带损伤

B.后交叉韧带损伤

C.胫侧副韧带损伤

D.腓侧副韧带损伤

E.内侧半月板损伤