Now many young people ________posting articles and photos onto the Wechat (微信) to share with their friends.
_________ does Jim surf the Internet? Once a week.
_______he is busy, ________he helps us often.
Your child is only five. Is _____necessary for you to be so strict with him?
My mother always has__________ housework to do on weekends.
It’s important ______us to learn English well.