The buses run every 15 minutes: The trams run every 30 minutes.Đoạn văn23/32D. WRITING I. Read the situations and complete the sentences using the comparative form of thre adverbs in brackets. The buses run every 15 minutes: The trams run every 30 minutes.The buses ______________________________ (frequently)Nhập câu trả lời ở đây0/3000 ký tựXác nhậnGiải thíchHướng dẫn giải:Đáp án đúng: The buses run more frequently than the trains.