—Amy , I would like your uncle to help me repair the computer.

—Sorry, he _____help you today . He won’t come back until tomorrow.

A．shouldn’t

B．may not

C．can’t

D．mustn’t

出现下列哪项最应考虑"骨软骨瘤"恶变可能（）

A.短期内生长迅速

B."软骨帽"厚大于20mm

C.软骨帽内点状、环形钙化

D.MRI未见"软骨帽"

E.骨膜反应