Trắc nghiệm: It is desirable that the hotel manager remember to call the __________ staff every 6 months to clean up the air conditioners. | Gửi trắc nghiệm |
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Trắc nghiệm: It is desirable that the hotel manager remember to call the __________ staff every 6 months to clean up the air conditioners. | Gửi trắc nghiệm |