this is ------- -------- （pen).There are -------- (pen).填空

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this is ------- -------- （pen).There are -------- (pen).填空

this is ------- -------- （pen).There are -------- (pen).填空
this is ------- -------- （pen).There are -------- (pen).填空

this is ------- -------- （pen).There are -------- (pen).填空
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pens

a pen,pens

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This is is this This is THIS IS this is this is this is 比如 this is fly Is this a book? Yes,this is. This is life .This is live! This is Mary.意思不变：This is （ )( ) This Is Me,This Is You 歌词 This is a man提问( ) is this? this is kangkang.为什么用this is 《This is my This is my This is (he).This is (me). what is this?-It is. What is this?It is Is this?your friend is