WE OFFER THE BEST SERVICES WITH A WELL- TRAINED STAFF, WHO AR...

Câu 16. We offer the best services with a well- trained staff, who are always thoughtful and courteous to customer. A. friendly B. well-mannered C. polite D. rude Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.