we must buy things we ( )A.need not B.do not need C.have not

we must buy things we ( )A.need not B.do not need C.have not We mustn't buy things we____ A.needn't B.need not C.don't ne We must not more lights than we need A turn on B turn off C There are many things we need to know that we do not learn a we may not know how to buy the things we need译成汉语 We can save money by ____expensive things A.buy not B.not bu have to,must,do not need,needn't的区别 Things do not change,we We can save money ________snacks.A.not to buy B.by not buy C I'm not tired and_ have a rest .A.need B.don't need C.needn' She ( ) ang help.A.does not need to B.need not C.needs not . we do not need to go to extremes怎么翻译?