They provide a means of keeping ______ of the thousands of journal papers that are published monthly or quarterly.

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问题 They provide a means of keeping ______ of the thousands of journal papers that are published monthly or quarterly.

选项 A、track
B、contact
C、relation
D、steps

答案A

解析 keep track of是一个词组，意为“跟上……，与……保持联系”。

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在职申硕（同等学力）英语

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