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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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For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

每题都有对应标记的A、B、C和D四个选项，请选择最佳选项并在答题卡2的相应字母中间划横线。

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