按要求完成句子。
1. This is my pencil. (改为否定句)
___________________
2. It is an English book. (变为一般疑问句)
___________________
3. Is that a rubber? (作肯定回答)
___________________
4. is, this, case, pencil, your (.). (连词成句)
___________________
5. Is this your new schoolbag? (改为肯定句)
_______is ______ new schoolbag.
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