Câu 1: Clean-up activities are organised by the club every weekend. Câu 2: 40 million hamburgers are eaten every day. Câu 3: This museum isn’t visited very often by tourists. Câu 4: Thousands of emails are sent to the star by women every month. Câu 5: A new house will be built by my grandfather next year. Câu 6: A new car will be bought by them. Câu 7: The lesson is explained by the teacher. Câu 8: The patients will be examined by the doctor. Câu 9: Noise is often made in class by these boys. Câu 10: English is spoken all over the world. Câu 11: These exercises won’t be done quickly by me. Câu 12: The report will be finished by her by noon. Câu 13: The bill will be paid by them before the first of the month.