The study was carried out in one small town so we can’t be sure that the results are truly ________.

I remember a _____ famous scientist said that we should believe in ourselves first of all.

______ with so many challenges, Yang Guang, a blind young fellow, didn’t give up; he made great efforts to win success.

After the long journey, the three of them went back home, _________

Please remember to remind them that the products inside are ________ and must be handled with great care.