Вставьте слова в нужную форму conduct : discover : make : prove : invite : develop : invent : do : do
1 Radiation by Pierre and Marie Curie in 1900.
2 Experiments in the medical university every day.
3 An important discovery by Newton when he was resting under an apple tree.
4 The gravity theory many times so far.
5 The telephone in the 1870s.
6 New methods nowadays by teachers and lecturers to organise the studying process better.
7 A lot of research must to study side effects of new drugs.
8 Many tests and trials to prove safety of a new method.
9 People can to act as guinea pigs for medical experiment.
1) was discovered
2) are done
3) was made
4) has been proved
5) was invented
6) are developed
7) be conducted
8) are done
9) be invited
Объяснение: