填空题

【参考答案】

carbon ∧ are→that或去掉are(过去分词短语作定语)
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单项选择题
A．He is unpleasant to be with.B．He is an introverted person.C．He is very enthusiastic.D．He is easy going.
A．He is unpleasant to be with.
B．He is an introverted person.
C．He is very enthusiastic.
D．He is easy going.
填空题
plan ∧ observe→to
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