Exercise 4. Write the second sentence so that it has the same meaning to the first one.
1. If you often go swimming, you will keep fit.
      -> Swimming ____________________________________________________________
2. It is bad for your heart if you eat too much meat.
      -> Eating too much meat __________________________________________________
3. She took an aspirin because she wanted to stop her toothache.
      -> She took an aspirin to __________________________________________________
4. You can learn things better if you do exercise. (help)
      -> Exercise _____________________________________________________________
5. It's a good idea to do exercise regularly.
     -> You _________________________________________________________________
6. Tom's gained 5 kilos since he quit smoking.
      -> Tom's put ____________________________________________________________