听到问题后，必须从A、B、C、D四个选项中选出最佳选项。

After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.

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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。

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.

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在这种情况下，您可以跳过后面的选项a和B，并直接继续到步骤3。

In that case, you can skip Options a and B, which follow, and proceed directly to Step 3.

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