---The students of Class 7 are going to the seaside this weekend.

---Remember _____ them not to keep _______ alone in the sea. It’s dangerous.

A．telling; swimming

B．telling; to swim

C．to tell; to swim

D．to tell; swimming

各级专责必须加强本单位数据检查，地市公司按月开展，网省公司按季开展。