| Blanks 1 through 4 are based on the following conversations. | ||
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| Blanks 1 through 4 are based on the following conversation. | ||||||||
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| 请听下面一段材料,回答第1至3题。 | |||||||||||||
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| Blanks 1 through 4 are based on the following conversations. | ||
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| Blanks 1 through 4 are based on the following conversation. | ||||||||
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| 请听下面一段材料,回答第1至3题。 | |||||||||||||
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