Before leaving home, make sure to turn off the electricity, lock the door, ________ the windows open.

A．and not to leave

B．instead of leaving

C．rather than leave

D．and not leave

龋病的药物治疗最适用于

A．静止龋
B．猖獗龋
C．牙本质浅龋
D．未成洞的浅龋
E．乳牙龋