根据句意用适当的人称代词填空。

1. This is Linda. _____ is my friend.

2. This is my daughter. _____ is ten

3. —What's this?

    —_____ is a pen.

4. This is John. _____is my brother.

5. —Are those your friends?

    —Yes, _____ are.

6. —Are _____eleven years old?

    —No, I'm ten.

7. —Are you and Tom good friends?

   —Yes, _____ are.

船舶在宽度受限制的水道中顶流使用单拖船向右掉头，为了减小漂移，宜让拖船：（）

A.顶推大船右舷船尾

B.吊拖大船右舷船首

C.顶推大船左舷船尾

D.吊拖大船左舷船首