预科部寒假自主学习英语作业（十）

Thatiseraserandit'sbrown. A.an;an B.an;a C.an;/ 

Thisis. A.pens B.myapen C.mypen D.pen

—Isthisyourruler?—Noitisn't.Thatruleris. A.my B.

—IsEricyourteacher?—Yes. A.itis B.heis C.youare 

Herehisboxes. A.is B.am C.are D.do