Select the option that expresses the given sentence in active voice.

The lock has not yet been repaired by the locksmith.

The locksmith has not repaired the lock yet.

The correct option that expresses the given sentence in active voice is The locksmith has not yet repaired the lock.

The other options are incorrect because:

• The locksmith does not repairs the lock is in the present tense, while the original sentence is in the present perfect tense.
• The locksmith is not repairing the lock yet is in the present progressive tense, while the original sentence does not imply that the action is ongoing.
• The locksmith had not repaired the lock till then uses the past perfect tense, while the original sentence does not imply that the action happened before another event.