Passive Voice Practice - Mora

Our understanding of the brain has changed with developments in science, surgery and medical technology. For example, as new technologies were invented, the brain was thought (1) ________ like a mechanical watch or telephone communication.

• to be

• that it is

For example, as new technologies were invented, the brain was thought to be like a mechanical watch or telephone communication and, more recently, it (2) ________ as a computer.

• has been described

• describes

After Galen proved that the brain was the centre of intelligence, it was generally assumed that different parts of the brain (3) ________ certain senses and functions of the body.

• to control

• controlled

However, the brain could only really (4) ___________ from the outside by studying animal brains and dissecting human bodies.

• understand

• be understood

Knowledge increased as a result of surgery where a patient had a tumour removed from their brain and the resulting physical change meant functions could be mapped to the part of the brain that had been operated on. This mapping came about as much through failed operations as successful ones. Now operations (5) __________ while the patient is awake and talking, so if a part of the brain (6) ________ and it affects one of their senses, they can tell the surgeon!

• sometimes carry out / touched

• are sometimes carried out / touched

• are sometimes carried out / is touched

• sometimes carry out / is touched

Since the late 1970s, medical technology such as MRI scanning (7) ___________ safe research into the brain without the need for surgery or X-rays

• has allowed

• has been allowed

MRI uses powerful magnets and computer imaging to see high blood flows in different parts of the brain that (8) ________ to show brain activity.

• believe

• are believed

If people (9) _________ their brains scanned while doing various thinking activities, researchers think they can (10) __________ more accurately how the brain works. One result of this research is to show the limits of the braincomputer comparison. For example, it is now understood that memories are not stored in one place but are the result of activity in many parts of the brain.

• have / identify

• have / be identified

• is / identify

• is / be identified

How easy was this exercise?

• Really easy

• Not so easy