Question

Complete the sentences with the correct form of a verb from the list.
Underline the stress in the verbs and also in the bold words.

develop / discover / do(x3) / invent / make / prove / volunteer

1) Pierre and Marie Curie ..... in the early 1900s.

2) Scientists usually ..... in a .

3) Archimedes ..... an important in his bath.

4) Isaac Newton's experiments ..... his that gravity existed.

5) The telephone was ..... in the 1870s.

6) companies try to ....... new drugs to cure illnesses and diseases

7) Scientists have to ...... a lot of into the possible of new drugs.

8) Before a company can sell a new drug, they have to ..... tests and to make sure it is safe.

9) People can ...... to be in clinical trials.

Answer 1

Ответ:1) Pierre and Marie Curie discovered radioactivity in the early 1900s.

2) Scientists usually do research in a laboratory.

3) Archimedes developed an important principle in his bath.

4) Isaac Newton's experiments proved his theory that gravity existed.

5) The telephone was invented in the 1870s.

6) Pharmaceutical companies try to develop new drugs to cure illnesses and diseases.

7) Scientists have to do a lot of research into the possible effects of new drugs.

8) Before a company can sell a new drug, they have to do tests and make sure it is safe.

9) People can volunteer to be in clinical trials.

Stress in bold words:

1) dis-COV-ered

2) re-SEARCH

3) de-VEL-op-ed

4) proved

5) in-VENT-ed

6) de-VEL-op

7) re-SEARCH

8) do, tests, safe

9) vol-un-TEER