Where is he?He must还是must be on that island.

Where is he?He must还是must be on that island. He must be fun.何如改成一般疑问句?Must he be fun 还是Is he fun? The l------is on ,He must be at home. He must be happy! he must ( )here.《be》 Where is Tony?He ____ in the library.A.are B.be C.must be -- ( )he be at home now -- Yes,he must.The light is on A.Mus 单句改错题!麻烦拉!He insisted that the work must be finished on time He must be at home,__the light in his room is on. Simon is crazy about playing video games;now he must be on h Look:Jack is putting on his hat and coat.He must (be going) The light is on in his room ,I'm sure he ___back A.must be B