_____nocauseforalarm,theoldmanwentbacktohisroom.

Hesetupinbusiness____hisownandwasverysuccessful.

患者男，40岁，2周来右侧咬物不适，冷水引起疼痛，近2日来夜间疼痛，影响睡眠，并引起半侧头痛，疼痛不能定位，检查右侧上、下磨牙面均有深的龋洞。对患牙的应急处理为

At______,photographyisachemicalprocess,duringwhichalight-sensitivematerialisalteredwhenexposedtolight.

Wecanhear____fromthebackoftheroom.