IELTS Reading Practice Sentence Completion
You should do the Sentence Completion Task before this activity.
1. Remember the reading strategy
2. Practice IELTS Reading Sentence Completion
Like any other electrical device, a pacemaker needs power. Since the first permanent pacemaker was installed in 1958, manufacturers have tried many different ways of powering them. For example, a variety of chemical batteries have been used. However, these need to be replaced frequently, which requires operating on the patient.
Today, non-rechargeable lithium batteries are common. Used in many implants, they provide between seven and ten years of life. That is more than enough: by the time the battery has run down it is generally time to replace the whole device with a newer model.
But that has not discouraged researchers from trying to find a small, constant energy source that does not require recharging. Now, several researchers are getting close to a solution using glucose, a type of sugar that is the main energy source for all cells in the body.
Glucose is continuously delivered everywhere in the body. This means a sugar-powered device would have a constant supply of fuel, and could be put almost anywhere.
One approach, involves breaking down glucose in a living cell, naturally allowing electricity to be generated from the glucose. Unfortunately, at present, only two of the 24 electrons in a glucose molecule can be used, which is not yet enough to power a pace maker.
Adapted from the Economist, June 30th, 2012
Complete the sentences with information from the text. Write NO MORE THAN TWO WORDS for each answer.
- Since they were invented, pacemakers have been powered by many types of ____________________.
- New batteries last for a maximum of ____________________.
- Scientists are trying to locate ____________________ that never needs recharging.
- The human body is mainly powered by ____________________.
- It is possible to put a sugar-powered pace maker ____________________ in the body.
- The new approach means electricity ____________________ comes from the glucose.
- Now, scientists can only get electricity from ____________________ electrons.
Check your answers below.
- 10 years
- (an) energy source
- almost anywhere
How did you go? Write how you did in the comments below.
Share this Post