【多选题】票据丧失后,可以采用的补救措施有[填空(1)]。
【单选题】When you play football, it's dangerous to _______ players and falling down. [ ]
【单选题】—______ that girl? —She's my sister. [ ]
【单选题】It's dangerous to walk alone ____ night.
【判断题】It's dangerous to use the elevator in case of a fire.
【单选题】It's dangerous to let the children who are _____ go swimming in the river.