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单项选择题

Listen to the conversation and circle the appropriate letter.

According to the teacher, referencing materials in a paper

A．should take up a small proportion
B．must be authoritative
C．are useful in supporting the points
相关考题

单项选择题 The formative assessment is featured with __________ .

填空题

填空题 The first stage of the process is __________ .

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