单项选择题

A．Buses and trains are too crowded.
B．A person can move around freely.
C．It is easy to maintain cars.
D．A driver is usually safe in his car.
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单项选择题
A．The rapid growth of the service sector of the world economy.B．The invention of the computer.C．The rapid growth of the world economy.D．The blurring of the line between the computer and other equipment.
A．The rapid growth of the service sector of the world economy.
B．The invention of the computer.
C．The rapid growth of the world economy.
D．The blurring of the line between the computer and other equipment.
单项选择题
A．Flour, baking soda, salt, butter, sugar, eggs, chocolate chips.B．Flour, baking soda, vinegar, sugar, salt, eggs, chocolate chips.C．Flour, baking soda, tomato sauce, butter, salt, eggs, chocolate chips.D．Flour, baking soda, soy, butter, sugar, eggs, chocolate chips.
A．Flour, baking soda, salt, butter, sugar, eggs, chocolate chips.
B．Flour, baking soda, vinegar, sugar, salt, eggs, chocolate chips.
C．Flour, baking soda, tomato sauce, butter, salt, eggs, chocolate chips.
D．Flour, baking soda, soy, butter, sugar, eggs, chocolate chips.
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