单项选择题

Why was the man delayed（）

A.He had a traffic jam.
B.His appointment was changed.
C.He had a flat tire.
D.His bicycle was stolen.

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Where does the conversation probably take place（）

A.In a restaurant.
B.In a department store.
C.In a hotel.
D.In an office.
单项选择题
What does the new production line save（）

A.Water and electricity.
B.Transportation expenses.
C.Raw materials.
D.Time and space.
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