以腹胀、便秘、腹泻、便血、肠梗阻为主要表现的是（）。

A.左半结肠癌

B.右半结肠癌

C.小肠肿瘤

D.乙状结肠扭转

E.溃疡性结肠炎

Would you like to go to the concert with us this evening?（）

A.No, I already have plans.

B.I'd love to, but I'm busy tonight

C.No, I really don't like being with you

D.I'm ill, so I shouldn't go out.