以下这道题``选哪个?We must make some investigations we can draw any conclusion.We must make some investigations we can draw any conclusion.A.sinceB.beforeC.untilD.when

以下这道题``选哪个?We must make some investigations we can draw any conclusion.We must make some investigations we can draw any conclusion.A.sinceB.beforeC.untilD.when we must talk------English in the English class.A,in B,at 选哪个 We must keep ourselves____so that we can enjoy a better life.A.enough health B.healthy enough选哪个,为什么? We must keep ourselves____so that we can enjoy a better life.A.enough health B.healthy enough选哪个,为什么? We must do（）our parents tell us 选哪个that if as which 请问选择哪个? We must we must water .it is very important to us A;leave B；safe C;save 选哪个,说理由. we must help ( )A a blind B the blind C people blind D the people 请问选哪个 为什么 We must get up early tomorrow,( ) we will miss the 6 o'clock train.A.so B.or C.but D.however请问选哪个? Dogs are man's friend.We must ( )them.1.Dogs are man's friend.We must ( )them.A.look forB.findC.look after请写出选哪个选项,并说说为什么 she_______ yesterday's test,but she didn't.以下四个选项应该选哪个啊?急.a.should have studiedb.would studyc.might be studyingd.must have studied must be 几个用法的区别There must be,it must be,this/that must be这三者有什么区别?说清楚,说例句.（ ）must be something wrong with the CPU.（选哪个?）这道题貌似一直都争议很大呀! 10.I'm afraid we must leave now.--- ________ .--- No,I'm afraid we really must.We have to meet our teacher at ten o'clock.A.Oh,please do B.Don't be afraid C.Yes,it's too late D.Must you?It's still early.选什么呀 We must value what we When can we discuss the problem?__when we can,we must prepare for it right now.A:No matter B:Even though C:As soon as D:So that选哪个 为什么选啊? we must prevent the farmers ___new farmlands,and we should do what we can_the giant pandas.选哪个a.making,to rescueb.to make,rescuingc.making,rescued.to make,to rescue We must ( )(work)hard. we must call the