This printer is of good quality. If it ________ break down within the first year, we would repair it at our expense.
____person like him won’t be satisfied with ____ little progress that he has made.
No man is born _____. We all need to learn to become _____.
English is one of the ______ languages at international meetings.
The _____, I think, he drew from his simple experiment is not scientific.
The main cause of HIV / AIDS infection in China is drug abuse, ______ is very serious in Yunnan.