粘液脓血便伴里急后重可见于

A．消化性溃疡

B．急性细菌性痢疾

C．肠结核

D．小肠血管畸形

E．结肠癌

—How many desks are there in your classroom?  

—______ twenty-six.        [ ]

A. They're        

B. There's        

C. There're