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1. They carry out different experiments in the chemical laboratory

2. After each lesson we ventilated our classes

3. The students place laboratory vessels in the tables

4. In a year we shall equip our chemical laboratory with modern apparatuses

5. Fahrenheit introduced a new scale into the experimental work in the seventeenth century

6. Laboratory workers obtain large amounts of distilled water by distillation

7. After the experiment was over we recorded all the findings

1. They carry out different experiments in the chemical laboratory

Different experiments are carried out in the chemical laboratory by them

2. After each lesson we ventilated our classes

Our classes were ventilated after each lesson by us

3. The students place laboratory vessels in the tables

Laboratory vessels are placed in the tables by the students

4. In a year we shall equip our chemical laboratory with modern apparatuses

Our chemical laboratory will be equiped with modern apparatures in a year by us

5. Fahrenheit introduced a new scale into the experimental work in the seventeenth century

A new scale was introduced into the experimental work in the seventeenth century by Fahrenheit

6. Laboratory workers obtain large amounts of distilled water by distillation

Large amounts of distilled water by distillation were obtained by Laboratory workers

7. After the experiment was over we recorded all the findings

All the findings was recorded by us After the experiment was over.