51/ The bill must be paid at once.
52/ English is spoken by many people in the world.
53/ It's impossible to work in those conditions.
54/ Your bicycle will be borrowed tommorow afternoon.
55/ Many dangerous diseases can be cured by Penicillin.
56/ Is rice exported to Britain by your country ?
57/ I was very delighted to pass the exam.
58/ This question is too difficult for us to answer.
59/ She is looking forward to seeing her grandparents.
60/ This letter will be translated into Vietnamese.
61/ It's impossible to travel around the city in a day.
Chúc bạn học tốt !!