71．Weteenagersmustlearnourselvestokeepsafe．72．Ifwecookathome，weshouldbemorecareful．73．Wemustremembernottoletinwhenwestayathomealone．74．Whenwewalkthecrossings，weshouldfollowthetrafficlig

Question

71．We teenagers must learn___ ourselves to keep safe．
72．If we cook___at home，we should be more careful．
73．We must remember not to let___ in when we stay at home alone．
74．When we walk___ the crossings，we should follow the traffic lights．
75．We should listen to our teachers and not do___ things at school．

Answer 1

71．to protect   72．by ourselves   73．strangers   74．across   75．dangerous