Пожалуйста помогите с этими предложениями! Fill in the gaps with modal verbs ( must, may, can, could, have to, be to, needn’t, should, ought to, ) or their equivalents: 3. She… has already written her test. 4. … he have told such silly things? 5. He … to help them. They … his help.

3. She must have already written her test.
4. Could he have told such silly things?
5. He ought to help them. They need his help.