My pen is in pencil case.哪里错了?

There is a pen in my pencil case改为I () a pen in my pencil case My pen is in my pencil case.(改为一般疑问句) My pen is in my pencil case.(对in my pencil case提问) my pen is in pencil case 哪里错了? My pen is in the pencil case改为一般疑问句? My pen is in pencil case.哪里错了? My pen is in pencil case.中有处错误请改正 改错：The pen in your pencil box is newer than it in my pencil box． What ________in my pencil-box?There is a pencil,a pen and an easer in it. there is a pen in my pencil-box.there is an apple on the table. this is his pen.my is in the pencil box 哪里错了 怎么改 this is his pen.my is in the pencil box 哪里错了 怎么改 Its my pencil case.Whats in it?Look,this is a pen. There is a pen in my pencil case.【改为同义句】 (1)red,pen,his,my,in,is,pencil-box,brother's连词成句 Where is my pen and pencil?还是Where are my pen and pencil? where ()my pen and my pencil?1,are 2,is This is my pen,____that is your pencil .选项:A :in B:Of C:and D:but