Question

2 Complete the sentences with the correct passive form of the verbs in brackets. 1 Antibiotics (prescribe) by doctors to fight disease for many years. 2 What would our lives be like if X-ray machines (not invent)? 3 Scientists believe that a vaccine to prevent malaria (develop) soon. 4 In the past, many patients (infect) each year in dirty hospitals. 5 Natural plant remedies for illnesses (discover) all the time. 6 Anaesthetics (not use) in operations until the 19th century.​

Answer 1

1 Antibiotics ARE PRESCRIBED by doctors to fight disease for many years.

2 What would our lives be like if X-ray machines WERE NOT INVENTED?

3 Scientists believe that a vaccine to prevent malaria WILL BE DEVELOPED soon.

4 In the past, many patients WERE INFECTED each year in dirty hospitals.

5 Natural plant remedies for illnesses ARE DISCOVERED all the time.

6 Anaesthetics WERE NOT USED in operations until the 19th century.​

Answer 2

1. Antibiotics have been prescribed by doctors to fight disease for many years.
2. What would our lives be like if X-ray machines had not been invented?
3. Scientists believe that a vaccine to prevent malaria will be developed soon.
4. In the past, many patients were infected each year in dirty hospitals.
5. Natural plant remedies for illnesses are being discovered all the time.
6. Anaesthetics were not used in operations until the 19th century.