Complete the sentences with the correct form of the verbs

1. Radio and telegraph
   [ ]
   with the help of A.Popov.
2. A really huge impact
   [ ]
   by Pierre and Marie Curie in studying radiation.
3. A great number of experiments
   [ ]
   daily in our medical centre.
4. Important discoveries in medicine
   [ ]
   since the beginning of the 21st century.
5. Something can
   [ ]
   for every person in the world to help those who are in need.
6. Humanity hopes that a cure for any disease
   [ ]
   one day.
7. The first telephone
   [ ]
   in the 19th century.
8. More than a hundred experiments must
   [ ]
   before we are able to say if the theory works or not.
9. Online teaching methods
   [ ]
   nowadays to make the studying process easier and more effective.