单项选择题

A. Trying to telephone someone.
B. Attending a concert.
C. Waiting in line.
D. Canceling reservations.

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单项选择题
A. The language laboratory.B. Travel.C. Studying in high school.D. Going to movies and watching TV.

A. The language laboratory.
B. Travel.
C. Studying in high school.
D. Going to movies and watching TV.
单项选择题
A. To transport water to higher place. B. To transport vegetables quickly.C. To bring nutrients to the soil. D. To adjust the soil temperature.
A. To transport water to higher place.
B. To transport vegetables quickly.
C. To bring nutrients to the soil.
D. To adjust the soil temperature.
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