a talk with his mother, the little boy hasseen to _____ that the same mistake doesn’t happen again

ing to the regulation of Education Ministry, a full-time middle school or primary school _______ hold a flag-raising ceremony once a week, except during vacations.

Although I try to talk to my classmates, I still find _____ hard to make good friends with them.

What is it _____ his daughter needs most

No matter how you read it, this sentence just doesn’t make sense-the most important words have been ________. [ ]