Question

A course of injections ____ prescribed by the doctor

Answer 1

Answer: Is

is prescribed

even though injectionsis in the plural form, there is A course there which means the subject here is more focused on A course than injections so "are" can't be used in this sentence and "is" will be the correct answer

Hope this helped you in any way possible  ^-^

Marking this answer as brainliest would be fantastic

Answer 2

Is prescribed by the doctor