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【参考答案】

are: is。因为主语pessimism是不可数名词，所以谓语动词应为单数。
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单项选择题
A．Because it is the first team that topped Mt. Everest.B．Because all of the members of the team are blind men except Erik Weihenmeyer.C．Because one of its members is Erik Weihenmeyer, who hopes to become the first blind man to clear the famed Mt. Everest.D．Because all of the members of the team are old men who are eager to climb the famed peak.
A．Because it is the first team that topped Mt. Everest.
B．Because all of the members of the team are blind men except Erik Weihenmeyer.
C．Because one of its members is Erik Weihenmeyer, who hopes to become the first blind man to clear the famed Mt. Everest.
D．Because all of the members of the team are old men who are eager to climb the famed peak.
单项选择题
A．by attending a classB．from her parentsC．through a gardening magazineD．by learning form her friend
A．by attending a class
B．from her parents
C．through a gardening magazine
D．by learning form her friend
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