Passive voice: Microscope and other lab equipment

Which sentence is correct?

• The first real microscope was discovered by Anton van Leeuwenhoek.

• The first real microscope was invented by Anton van Leeuwenhoek.

• The first real microscope were discovered by Anton van Leeuwenhoek.

• The first real microscope were invented by Anton van Leeuwenhoek.

The technicians wash the glassware every day.

• The glassware were washed by the technician every day.

• The glassware was washed by the technician every day.

• The glassware are washed by the technician every day.

• The glassware is washed by the technician every day.

We store the microscopes in that cabinet.

• The microscopes kept in that cabinet.

• The microscopes am kept in that cabinet.

• The microscopes is kept in that cabinet.

• The microscopes are kept in that cabinet.

They didn't follow the safety measures and there was an accident.

• The safety measures weren't followed and an accident was thered.

• The safety measures wasn't followed and there was an accident.

• The safety measures weren't followed and there was an accident.

• The safety measures wasn't followed and an accident was thered.

Why did the technician leave the test tube on the desk?

• Why the test tube was left on the desk?

• Why was the test tube left on the desk?

• Why was the test tube leave on the desk?

• Why the test tube was leave on the desk?

Which sentence is correct?

• The mass of the samples were determined by an analytical balance.

• The mass of the samples was determined by an analytical balance.

• The mass of the samples was determined by an analytical balance.

• The mass of the samples was determined with an analytical balance.

The thief stole all our equipment.

• All our equipment was stole by the thief.

• All our equipment was stolen by the thief.

• The thief was stolen all our equipment.

• The thief were stolen all our equipment.

When we finished the experiment, the results ... (study) by Dr. Newman.

We analysed a toxic gas and so the experiment ... (do) in a fume hood.

Flammable substances ... (store) in safety cans.