Verb conjugation of "reproduire" in French

Actually, he is entering it into our website and marking 'I took the idea from another source' then the website knows that it should not display any of this content. However, the user is allowed to exercise what he entered.
The system will collect information about the learning behavior and guide the user through a tailor-made process that is best suited for him. This technique is not entirely new but we are redesigning the whole concept of it.
Have you ever visited the U.S. before and if so, where have you been in the U.S.? I've been travelling in California, it was very amazing. We have traveled by car. Here are my corrections.