单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．Bending the elbows as low as possible.
B．Keeping the body straight.
C．Bending the body at the waist.
D．Keeping the feet to the floor.
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A．More and more people are used to the Internet.B．Cell pones are Becoming an important part of our life.C．Postcards are in the danger of extinction.D．Communications between people are becoming easier.
A．More and more people are used to the Internet.
B．Cell pones are Becoming an important part of our life.
C．Postcards are in the danger of extinction.
D．Communications between people are becoming easier.
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A．To support skipping meals by giving scientific proofs.B．To explain how skipping meals worsens people’s health.C．To explain how skipping meals helps improve health.D．To explain how skipping meals affects people’s health.
A．To support skipping meals by giving scientific proofs.
B．To explain how skipping meals worsens people’s health.
C．To explain how skipping meals helps improve health.
D．To explain how skipping meals affects people’s health.
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