Fast food is full of fat and salt; by __________（eat）more

Fast food is full of fat and salt; by __________（eat）more fast food people will get more salt and fat than they need in their diet

答案：eating 　　巧記：by在前，用-ing， by在后，用-ed。注意，介词后面的提示词是动词通常都用-ing形式。

哦，回答的不错