剧烈呕吐后的呕血多见于()

A．消化性溃疡

B．急性胃粘膜病

C．胆石症

D．食管贲门粘膜撕裂伤

E．慢性胃炎

We have heard what he has said; we are waiting to see            he will do. [ ]

A．how

B．what

C．when

D．that