患者粪便量多，呈泡沫状，灰白色有光泽，具有恶臭，镜检有较多脂肪小滴，应首先考虑

A．肠炎

B．肠蠕动亢进

C．慢性胰腺炎

D．细菌性痢疾

E．结肠癌

-- Who do you think _____ such a foolish thing?

-- It _____ Tom, but I’m not sure.

A．could have done; may have been

B．could have done; must have been

C．should have done; may be

D．must have done; might have been