单项选择题


A．To make the woman angry.
B．To please the man’s mother.
C．David is the man’s good friend.
D．David is good at carrying on conversation.
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单项选择题
Why does the author say that nothing was wasted before the invention of fridges
A．People would not buy more food than was necessary.
B．Food was delivered to people two or three times a week.
C．Food was sold fresh and did not get rotten easily.
D．People had effective ways to preserve their food.
填空题
His salary as a director is much higher______________________________(和老师的工资相比).
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