These thing can be dangerous if they are not used properly

These thing can be dangerous if they are not used properly These things can be danger ous if they are not used properly 英语句子翻译：These plans must be modified, if they are to be used 英语翻译Sounds are not language if they can not be put together 英语翻译If you are chewing properly,you will simply not be able These _____（ be not ） cats.They are dogs. Do you know our school life could be dangerous if we are not How can they be happy i____ they are not free? these boxes can be used ___ seats if we don't have enough se if bricks can be some thing Are these your() Yes,they are our school thing Computers are not so expensive as they ____to be.A.useB.used