Поставьте следующие предложения в вопросительной форме: 1.the students of our institute many interesting subjects. 2. during practical classes our group makes many experiments. 3. they always observe the reaction. 4. my friend dissolves substances. 5. we need burners for heating substances.

1. Have the students of our Institute many interesting subjects?

2. When does our group make many experiments?

3. They always observe the reaction, don't they?

4. Who dissolves substances?

5. We need burners for heating substances, don't we?

1. Do the students of our Institute have many interesting subjects?

2. Does our group make many experiments during practical classes?

3. Do they always observe the reaction?

4. Does my friend dissolve substances?

5. Do we  need burners for heating substances?