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【简答题】
a large, high-protein meal / feel tired / can be caused by ( )
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【简答题】companies spend a lot of money on marketing them / an increase in sales of energy drinks / may be caused by ( )
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【单选题】(B) "Taking up exercise, eating right, and getting enough sleep"
A.
cause
B.
effect
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【单选题】(A) "people are feeling more and more tired all of the time"
A.
cause
B.
effect
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【单选题】(E) "less tiredness during the day"
A.
cause
B.
effect
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【单选题】(C) "Regular swimming"
A.
cause
B.
effect
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【单选题】(F) "Eating this way"
A.
cause
B.
effect
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【单选题】(G) "difficulty focusing during the day"
A.
cause
B.
effect
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【单选题】(J) "a much happier world"
A.
cause
B.
effect
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【单选题】(H) "having at least eight hours of sleep a night"
A.
cause
B.
effect
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【单选题】(I) "good energy levels"
A.
cause
B.
effect
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