Is Mary in 中 in 是at home 还是 at here?

Is Mary in 中 in 是at home 还是 at here? Mary is good at English = Mary in English 玛丽在汤姆的前面翻译成英文是Mary is at front of Tom还是Mary is in front of Tom Mary is in Beijing now Mary is in 【组】Two Mary is ______ today.A.me B.in school C at school D.at the school. The lady ___ white is Mrs Mary.A.in B.at C.on Mary is taller than any other girl in her class.中any other后面要接的是单数吗? Mary is in Grade Seven 改为复数 Mary is busy ( )in　her　　bedroom Mary is in the America now. mary is in c后面填什么 Is Mary in的同意句 ()1.Jim and Mary ________ good ________ English and Computer.A.are,in B.is,in C.are,at D.is,at Mary's name is (in)the left (of)the check.中in the left 是固定用法么?这里可以换其他介词么? Here is letter --- Mary --- her friend in Canada.是in,to 还是 from,to 是 to,from 还是 from,in --Is red girl in the Mary?--No.It___be Mary.She is doing her homework at home.A.mustB.canC.mustn'tD.can't Mary is in Beijing now 对 in Beijing 提问