Select the correct passive form of the given sentence.

The mechanic repaired my bike.

My bike was repaired by the mechanic.

The correct passive form of the sentence "The mechanic repaired my bike" is My bike was repaired by the mechanic.

The other options are incorrect because:

• My bike has been repaired by the mechanic uses the present perfect tense, while the original sentence is in the simple past tense.
• The bike is repaired by my mechanic does not use the verb "to be" in the passive voice.
• The bike was being repaired by my mechanic uses the past progressive tense, while the original sentence is in the simple past tense.