[单选题,7.1分] I don.t ______ the writer, but I ______

[单选题,7.1分] I don.t ______ the writer, but I ________ him. A.know of ... know B

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[多选题,8.8分] An example will ___________ how these o

[多选题,8.8分] An example will ___________ how these objects work together. A.show

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