Грамматическая песня: This is Wednesday, Isn’t It?

В этой грамматической песне-рифмовке тренируются:
• указательные местоимения (this / that / these / those)
• tag-questions (isn’t it? aren’t they?)
• выражение мнения (I think it is / I think so.)
• модальный глагол must

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This is Wednesday, isn’t it?
I think it is. I think so.
This is the first, isn’t it?
I think it is. I think so.
Is this the door to the roof?
I think so. It must be.
Are these the stairs to the basement?
I think so. They must be.
Is that the main entrance to the building?
I think so. It must be.
Those are the stairs to the basement, aren’t they?
I think so. They must be.
That’s the exit, isn’t it?
I think so. It must be.
This is the entrance, isn’t it?
I think so. It must be.