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【单选题】

When you boost your mood, you _____ it.

A.
worsen
B.
improve
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【单选题】If you're tired, you should eat spinach because it has _____.
A.
iron and folate
B.
serotonin
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【单选题】Jaimee Zanzinger works ______.
A.
at a magazine
B.
at a research facility
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【单选题】People get cranky when _____.
A.
their blood sugar drops
B.
they don't have enough vitamins
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【单选题】Vitamin C helps your body absorb _____.
A.
iron
B.
fiber
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【简答题】Chicken and beef are two foods that contain a lot of ( ) .
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【单选题】Salmon can help you with _____.
A.
anxiety
B.
sadness
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【单选题】Oatmeal and almonds can help you _____.
A.
sleep
B.
study for tests
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【简答题】Too much caffeine and sugar can affect a person’s ( ) , speeding up nerve activities.
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【简答题】A good diet and plenty of rest can help ( ) the symptoms of minor illnesses and make you feel better.
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【简答题】You need a lot of ( ) to be able to run a marathon.
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