If she . . . . . . . . late just one more time the manager . . . . . . . . suspend her.

The correct answer is: If she arrives late just one more time, the manager will suspend her.

The other

• Option A: If she is arriving late just one more time, the manager will suspend her. This is incorrect because the present continuous tense is used to express actions that are happening right now or that happen regularly. In this case, the action is not happening right now and it is not something that happens regularly, so the present continuous tense is not appropriate.
• Option B: If she will be arriving late just one more time, the manager will suspend her. This is incorrect because the future perfect tense is used to express actions that will have happened by a specific time in the future. In this case, the action is not something that will have happened by a specific time in the future, so the future perfect tense is not appropriate.
• Option C: If she arrives late just one more time, the manager will have suspended her. This is incorrect because the past perfect tense is used to express actions that had happened by a specific time in the past. In this case, the action is not something that had happened by a specific time in the past, so the past perfect tense is not appropriate.
• Option D: If she is going to arrive late just one more time, the manager will suspend her. This is incorrect because the future progressive tense is used to express actions that will be happening at a specific
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  time in the future. In this case, the action is not something that will be happening at a specific time in the future, so the future progressive tense is not appropriate.

The correct answer is: If she arrives late just one more time, the manager will suspend her. This is because the simple future tense is used to express actions that will happen in the future. In this case, the action is something that will happen in the future, so the simple future tense is appropriate.