Câu 1 During the exam, a pencil and eraser are required. — The people organising the exam will provide you with a pencil and an eraser.

Câu 2 Parents can be made liable for their children's debts. — Parents may be legally responsible for the money their children owe.

Câu 3 He was obliged to pay back the money that he had won. — He had the choice whether or not to pay back the money that he had won.

Câu 4 Students doing holiday jobs are exempt from paying income tax. — Students doing holiday jobs pay a smaller amount of income tax than other people.

Câu 5 The United Nations voted to impose mandatory sanctions on the country. — The United Nations imposed legally-binding sanctions which had to be obeyed by everyone, without exception.

Câu 6 Some companies force their employees to work long hours for low pay. — A lot of companies ask their employees to work long hours.

Câu 7 It was an emergency and she pressed the red button; there was no alternative. — There was nothing else she could do; she had to set off the alarm by pressing the red button.

Câu 8 Classes on Wednesday afternoons are optional. — It is necessary to attend classes on Wednesday afternoons.

Câu 9 It is compulsory to wear a crash helmet on a motorcycle. — It is your choice whether or not to wear a crash helmet when you ride a motorcycle.

Câu 10 The museum is asking visitors for a voluntary donation of £2. — You don't need to pay £2 to visit the museum.

Câu 11 Visitors to the country are ______ declare any excess tobacco or alcohol imports to the customs officer.

Câu 12 I'm afraid I have ______ but to resign from the committee.

Câu 13 If you are caught speeding, you will be ______ the payment of the fine.

Câu 14 Attendance at all classes is ______, otherwise you may not get a certificate at the end of the course.

Câu 15 Many retired people do ______ work in their local community.

Câu 16 In some countries, there is a ______ death sentence for all drug traffickers.

Câu 17 For visitors to Britain from outside the European Union, a visa may be ______.

Câu 18 I hate it when people try to ______ me to do something I don't like.

Câu 19 Most new cars come with ______ air-conditioning.

Câu 20 Children's clothes are ______ from VAT.