閱讀短文并回答下列問題．
Helen is a girl of nineteen years old．She likes to eat a lot of sweets，chocolate and French fries．She can't stop eating and she's getting fatter and fatter．Last month，when she went to a party，none of the boys wanted to dance with her because she was too fat．Helen was sad and decided to go on a diet．She thinks she must not eat sweet，or meat．She must do more exercise．And she must not sleep too much．After a month，she becomes a little thinner．
（1）How old is Helen？

She is nineteen．

She is nineteen．

（2）What does she like to eat？

She likes to eat a lot of sweets，chocolate and French fries．

She likes to eat a lot of sweets，chocolate and French fries．

（3）Why didn't boys dance with her？

Because she was too fat．

Because she was too fat．

（4）Does she go on a diet now？

Yes，she does．

Yes，she does．

（5）What must she do if she wants to be a little thinner？

She must do more exercise．

She must do more exercise．