单选题：The author believes the teacher's role in children's learnin

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题目内容：
The author believes the teacher's role in children's learning should be__________. A．the identifier and corrector of their errors
B．their helper and guide
C．the person to grade their performance and give feedbacks
D．the person to pass on something essential to them

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分类：英语四级  题型：单选题
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