Listen to the sentences and complete them with the correct word or words (there will be between 1 and 4 missing).
Spelling is important both in the OET and in your working lives, and this exercise will help you to improve.

The study compared the effectiveness of drug A versus drug B in treating hypertension.
The culture medium provided optimal conditions for bacterial growth.
The doctor will define the treatment plan based on the patient’s diagnosis.
Smoking can impact lung function and increase the risk of respiratory diseases.
The signalling pathway regulates gene expression in cancer cells.
Chronic stress can weaken the immune system and increase the risk of illness.
The radiologist will contrast the images to identify any abnormalities.
The surgeon used a minimally invasive technique to repair the hernia.
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