----I’m sure Andrew will win the first prize in the final.

----I think so. He ______for it for months.

A. is preparing                              B. was preparing     

C. had been preparing                       D. has been preparing

小脑幕切迹疝最有意义的临床定位体征是（）

A.患侧肢体活动减少或消失

B.对侧腹壁反射消失

C.患侧瞳孔散大

D.对侧肢体腱反射亢进

E.患侧下肢病理反射