单项选择题

Conversation One

A. Providing high-quality products for customers.
B. Providing good services for customers.
C. Doing everything you can to please and keep customers.
D. Establishing dialogues with the customers.
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单项选择题
A. The history of some famous cities.B. The population in the whole world.C. The difference between Europe and USA.D. The characteristics of some large cities.

A. The history of some famous cities.
B. The population in the whole world.
C. The difference between Europe and USA.
D. The characteristics of some large cities.
单项选择题
In the process of making coffee, almost one-third of the CO2 emission comes from （）

A. production
B. brewing
C. transportation
D. storage
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