Aprofessorandawriter_________presentatthemeeting.

Hi, Jack. What’s that on the desk?— Oh, it’s the new backpack my mom gave me for my birthday.

Ann is a careful girl．She always checks her exercises to there are no mistakes．

She_______ this book for 3 years, She______it in 2010.

Whose is this T-shirt?— It’s , the girl under the tree.