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【单选题】
Openness _____ one of the “Big Five” personality traits, which also _____ extroversion, agreeableness, conscientiousness, and neuroticism.
A.
is; include
B.
are; includes
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参考解析：
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举一反三
【单选题】Recommendations for stronger sunscreen use _____ by the Canadian Dermatologists’ Association.
A.
was made
B.
were made
【单选题】Many patients’ prognoses for a complete recovery from cancer _____ on the type of cancer they _____.
A.
depends; has
B.
depend; have
【单选题】If you're tired, you should eat spinach because it has _____.
A.
iron and folate
B.
serotonin
【单选题】People get cranky when _____.
A.
their blood sugar drops
B.
they don't have enough vitamins