VI. Choose the correct variant:

1. Man ______ nature by now.


was conquered
has conquered
conquered is conquering

2. Now the students of our group ______ the properties of this new constructional material.


are studying
is studying
study
studies.

3. They ______ at home now.

are not
were not
is not
were

4. This scientist ______ just a great contribution to the space research.

have made
have maked
made
has made

5. Next month I ______ my first exams at the University.

will take
take
taking
takes