He has taught children how to march in a parade.
He has taught children how to march in a parade.
He was teaching children how to march in a parade.
He was teaching children how to march in a parade.
He taught children how to march in a parade.
He taught children how to march in a parade.
He teaches children how to march in a parade.
He teaches children how to march in a parade.
Correct Answer:
He was teaching children how to march in a parade.
He was teaching children how to march in a parade.