--- You didn’t tell your parents the date of our graduation ceremony, did you?

--- No, but I ____. My sister had told them.

A．didn’t need to

B．needn’t have

C．couldn’t have

D．shouldn’t

腕舟骨骨折可分为（）。

A.腰部骨折

B.体部骨折

C.近端骨折

D.远端骨折

E.结节骨折