sent, how we can look after ______ old is becoming ______ hot and severe issue.

Could you tell me ________ we will have the meeting this afternoon

My English teacher insisted that the exercises _________ very difficult and that we ________ it carefully

It bethe vocyou the problem in the exercise because you know alot of words.

With the rapid development of recent years, the people, ____village I once worked in，live a happy life now.