Is thisyour pencil?请问答句是Yes,this is.It's my pencil.还是Yes,it is.It's my pencil.为什么?

Is thisyour pencil?请问答句是Yes,this is.It's my pencil.还是Yes,it is.It's my pencil.为什么? My pen is in pencil case.中有处错误请改正 my pencil is ____ my pencil case what is the pencil the pencil case is( ). this is your pencil what is that?it's____大神们帮帮忙what is that?it's____ 1 a pencil of Mary 2 a Mary's pencil (请说明理由) (It )is my pencil.请写出可以替括号里面的单词. 下面哪个地方错了,如果错了,请改正Look!This is a pencil case. where is your pencil?where is your pencil? what ( )is your pencil case? what is the ( ) for pencil Is that your pencil是什么意思 Is this your pencil?是什么意思? That is your pencil,__ Is that a pencil s___? Is this pencil your?改错 My___(two)pencil is short.