He ___ estimated the cost of the product and found that it might cost 10,000dollars or so.
The two things are the same in outward form but different _____.
Despite their good service, most inns are less costly than hotels of _____ standards.
High interest rates _____ people from borrowing money.
The noise was so _____ that only those with excellent hearing were aware of it.
We can't _____ one to change the habits of a lifetime in a short time.