填空题

S2. Why are speeds on motorways greater than those on other roads

【参考答案】

Because there are no sharp bends，no roundabouts and no traff......

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S3. What will happen if one vehicle stops on a motorway
单项选择题
A．Her teaching assistant would grade the exam papers.B．She would collect the exam papers herself.C．She would mark the exam papers herself.D．She would not give her students an exam.
A．Her teaching assistant would grade the exam papers.
B．She would collect the exam papers herself.
C．She would mark the exam papers herself.
D．She would not give her students an exam.
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