—I really don't know what I ________yesterday without the bike you lent me.

—Glad to have been some help to you.

A．could do

B．should have done

C．had done

D．could have done

确诊无脑儿后，下述处理哪些项不恰当（）

A.一经确诊应引产

B.可行毁胎术

C.出现肩难产可行剖宫产

D.因胎头小，不能扩张产道，可行胎头吸引器助娩

E.因胎头小，不能扩张产道，可行产钳助娩