Something must be done to build up a Green Great Wall succes

something must be done 英语疑难 急Something must____(do)to build up a Great Wall______(s something must to be done和something must be done区别 Something must be done to__young people not to smoke.A.make something must be done to solve the problems（）succeed something must be done to prevent some students from froping Something must be done to stop wild animals ------(kill) 用Something must be done to句型造十个句子 something must be done to ______ the bird flu. Something must be done to prevent city________ by thick smok there must something can be done Something must be done about it.