You should be careful when you see the sign.
-----Why do many people like to ride bikes? ----Because bikes not only need ________ space, but also cause _________accidents.
I think it’s easy ________you _________English well.
___________to London to watch the Olympic Games ___________my dream.
------Is this ruler Mary’s? ------No, it _______Mary’s. Hers is on the desk..
— Could you tell me ______ the Science Museum? — Next Saturday.
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