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一 单项填空（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. According to ________ announcement by Guangzhou Price Bureau, _________ new measures which have been taken recently are expected to cut the operation costs of each taxi driver by 1280 yuan
A. the; 不填 B. an; the C. 不填; the D. an; 不填
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. According to ________ announcement by Guangzhou Price Bureau, _________ new measures which have been taken recently are expected to cut the operation costs of each taxi driver by 1280 yuan
A. the; 不填 B. an; the C. 不填; the D. an; 不填
