单项选择题

the population is too large, we have to take measures to control the birth rate.

A) Although
B) Since
C) If
D) Until
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单项选择题
There are other easier ways to get lemonade, such as ______.
A．to buy lemonade powder and boil it with water
B．to go to department store
C．to buy cans of boiled water
D．to buy frozen lemonade and mix it with water
单项选择题
Lemonade is not a new drink. It______.
A．appeared for a long time
B．was brought by Chinese people
C．has been around for several decades
D．can help people recover from diseases
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