Not until he went abroad to further his study_______ the importance of English.

A．has he found

B． he has found

C．did he find

D． he had found

患者40岁，停经5个月， * * 流血15日，宫底平脐，听不到胎心，扪不到胎体。

本例患者确诊为葡萄胎后应立即采取的措施是（）.

A.备血，立即行清宫术

B.输血输液

C.静脉滴注缩宫素

D.子宫切除术后化疗

E.立即化疗