Sports and games ............... an important part in our lives

4. Sports and games ............... an important part in our lives . 
a. play                       b. plays                   c. played
5. The USA first ............. colour TV in 1953 . 
a. has                          b. have                  c. had 
6. We are now iin the city museum . ............... any objects on display .
a. Not touch                  b. Don't touch                       c. Don't touching