Extra Exercices

3.1 Choose a verb with either the present perfect or past simple for these sentences.

1) Research has shown thet cycling can help patients overcome theis illnesses.
2) The rabbit just appeared in my garden one day last week.
3) With this promotion, I feel that I have reached a turning point in my career.
4) Oh, no! My car has disappeared!
5) Quite early in the negotiations, they have agreed to lower the prices.
6) In 1788 he wrote his last great work in Vienna.
7) There's not much more to do, now that we have solved the main problem.
8) Throughout the summer of 1980 Malcolm continued to divide his time between London and New York.
9) When he was 13, his parents moved to the United States.

4.1 Complete these sentences with the verb given. Choose the present perfect or past simple.

1) According to yesterday's newspapers, astronomers in Australia have discovered a planet in a galaxy close to our own.
2) To help today's customers make a choice, a company in New York developed a video trolley - a supermarket trolley with a video screen to display advertisements and price information.
3) At the start of his career, Cousteau invented the aqualung, opening the oceans to explorers, scientists and leisure divers.
4) He proudly told reporters that the compeny has produced software to prevent the recent increase in computer crime.
5) John Grigg discovered the comet now called Grigg-Skjellerup, at the beginning of the 20th century.