The books are in my schoolbag.(对划线部分提问）
( Where are ) the books?
2.Are these two model planes Dave's?(作肯定回答）
Yes,(they are )
3.Is Gina's radio in the bookcase?(作否定回答)
No,(it isn't )
4.I know the English girl.(改为否定句)
I (don't ) know the English girl.
5.A pencil box is on the desk.(用 some 替换 a 来改写句子）
Some pencil boxes are on the desk .
加油!不明白再问!