What's the matter?Why are you laugh/laugh-ing?

What's the matter?Why are you laugh/laugh-ing? Why do you c()?You should laugh!What's the m() with your nos —can you hear the ( ) of children's laugh?—why are they so h No matter what the future, I would laugh it off 用动词的适当形式 why are you -(laugh) we're going to -(have)the base ---why are you 什么(laugh) ---because i什么(be)happy Why do you laugh ______ your photos Are they funny? “what's the matter with you why you are so unhappy? 选择正确单词 What's the matter?Why are you laugt/laughing?The spec 英语翻译Sam:What's the matter?Why are you laughing?Lingling:We'r laugh Why do you laugh --your photos?Are they funny 填介词