单项选择题

Why do some people become vegetarians

A．They feel that eating animals is unethical.
B．There are fewer livestock available due to the environmental pollution.
C．The consumption of meat will lead to financial problem.
D．Being a vegetarian is beneficial to the protection of water.
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单项选择题
Why does the author say reducing the amount of meat in one's diet is environmentally beneficial
A．People who eat meat usually have weaker immune systems compared to those of vegetarians.
B．A lot of food and water are consumed in order to raise livestock.
C．90% of animals are raised in confinement.
D．Raising animals causes most of the destruction of nature.
单项选择题
According to the book A Teen's Guide to Going Vegetarian, it could be inferred that ______.
A．some of the highest pesticide residues appear in meat and eggs
B．a meatless diet does not provide enough nutrients
C．protein can be found in almost every food
D．more than 80% of the corn in the United States are fed to livestock
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