1. This is a lady. She seeks a taxi 2. Look at the children. They play with their dog. 3. There is a man. He is eating ice cream. 4. There is a boy. He is in a hurry. 5. The girl is crossing the street. The street is full of cars.
Explanation: the answer is b because "a mettre" is the infinitive, "a mis" and "mit" are no good because when we translate it doesn't sound right in english.