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.
