Fill in the blank with the most appropriate option: The train is never late. It ______ (always/leave) on time.

The correct answer is: always leaves.

The train is never late, so it always leaves on time. The other options are incorrect because they do not accurately describe the train’s schedule.

• Always left is incorrect because it is in the past tense. The train is always leaving on time, so it is not correct to say that it always left.
• Is always leaving is incorrect because it is in the present continuous tense. The train is always leaving on time, but it is not always in the process of leaving.
• Has always left is incorrect because it is in the present perfect tense. The train is always leaving on time, but it is not correct to say that it has always left.