B Read the text again. Are the sentences true (T) or false (F)? 1 Doing exercise makes you tired. 2 Having friends is an important part of being happy. 3 Doing a difficult job uses all your energy. 4 Planning fun things to do can make you happy. 5 If you do something to make someone else feel good, you will feel good yourself. 6 Smiling too much can make you feel bad.