Spreadsheet sheet 1, "Overall Chain", will help you to do that.
电子表格1，“OverallChain”，将帮助您完成这个任务。
Mark the corresponding letter on Answer Sheet 1 with a single line through the centre.
在答题卡1相应字母中心处划一条线。
Mark the corresponding letter on Answer Sheet 1 with a single line through the centre.
在答题卡1相应字母中心处划一条线。
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