Определить видовременные формы глаголов и указать их инфинитив. 1) This student took an active part in the public life of his Institute. 2) The achievements in our science will provide for the progress in our economy. 3) Our machine-builders use the latest technical achievements in their work. 4) The extra-mural students received paid leaves for their exams.

1) Took - past simple - to take.
2) Will provide - future simple - to provide.
3) Use - present simple - to use.
4) Received - past simle - to receive.