题干
—Is this your pen, Sam?
—No, it's Peter's. _______ is in my pencil case.
A：My
B：Mine
C：He's
D：His
答案(点此获取答案解析）
B
—Is this your pen, Sam?
—No, it's Peter's. _______ is in my pencil case.
A：My
B：Mine
C：He's
D：His
