Complete the sentences with the Present Simple or Past Simple passive

Vitamin C was discovered in 1747.Toothbrushes were invented by the Chinese.The people were not taken to hospital after the accident.A new medical centre was opened in my town last year.A lot of remedies are made from plants.I am/was not given any medicine at the hospital.My teeth are checked twice a year.Vaccinations were not developed until the 18th century.I called for an ambulance but it was not needed.