1. We change design of our tradition products to attract more costumes.
=> costumes --> customers
2. The artisan moulded the clay for that he could make a mask.
=> for that --> so that
3. They had to look down the museum because it's no longer a place of interest.
=> look --> lock
4. We had better reviewing this chapter carefully before the exam.
=> reviewing --> review
5. Nowadays, few tourist come to this area, don't they ?
=> tourist --> tourists