Food safety is important. Rules _____ to stop people from food pollution.

Many years ago, Mulan ________ up like a boy and _______ her father’s place to fight in the army.

If you _______ in class, you should ________ sorry to your teacher after class.

It is several years since he ______ ill and his illness _______ great damage to his health.[ ]

155 In Beijing volunteers are making useof every minute to ______ their foreign languages because volunteers must passa written test and an interview