This task is ______difficult for us. We need ______people.
There ______ great changes in our city in the last ten years.
--How is your grandma?--She is fine. She used to ______ TV at home after supper. But now she is used to ______ out for a walk.
– I often use micro-blog to communicate with others.-- You are so smart! Can you please tell me _____?
–I’ve shown you all the interesting and important places of our school.--Thank you for ______ so much time.
--I think students should have mobile phones to call their parents.--______. They often use them to play games instead.