I think something must be done to help the_____( home) after

something must be done something must to be done和something must be done区别 i think that something has to be done to stop our air from b 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 be something wrong with the computer,I think there must something can be done Something must be done about it.