句型转换（5%）
These are my grandparents. (变一般疑问句)
_______ these ______ grandparents?
Is this his picture? (作肯定回答)
_______, ______ is.
The tape player is in the room. (对划线部分提问)
_______ ________ the tape player?
She is a nice girl. (单数变复数)
_______ are nice ______.
They are erasers. (复数变单数)
______ is _____ eraser.