题目内容
5. This is a robot.
6. This is a parrot.
7. This is a rubber.
8. Open the book.
9. Close the book.
5. 6.
7.
8.
9.
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题目内容
5. This is a robot.
6. This is a parrot.
7. This is a rubber.
8. Open the book.
9. Close the book.
5. 6.
7.
8.
9.