Who cleaned the classroom just now Tom .

The Great Wall travels ____ deep valleys, ____ deserts and ____ mountains[ ]

It has been announced that all the students______ put on the masks before going to school in case they are infected withSARS virus

He suggested that we ____ the plan later, which suggested that he ____ against it.

There have been dozens of reports ____ people have seen a Wild Man in the Shennongjia Nature Reserve in western Hubei Province, China. [ ]