—By       local farmers, we hope        them improve their lives.

—I think it’s a good idea.

A．train; help

B．training; helping

C．training; to help

D．train; helping

细菌性痢疾肠道病变最显著的部位是在（）。

A.升结肠

B.横结肠

C.降结肠

D.乙状结肠

E.乙状结肠和直肠