标志溃疡性结肠炎活动期最重要的临床表现是（）

A.腹泻

B.腹痛

C.腹胀

D.呕吐

E.黏液脓血便

–I didn’t know ______

-Neither did I.

A．what was happened to him

B．what the matter was with him

C．what was wrong with him

D．where was the History Museum