Why did you laugh just now?— John wanted to tell usvery funny joke, but he forgotend himself.

I got to Qingdao ______ the morning of October 16th last year. [ ]

Sometimes most of us probably are angry ______ our friends, parents or teachers. [ ]

May I listen to the music here, Mr White? —-Sorry , you’d better ____ it like that..

Do you know Neil Armstrong? —- Yes, he is the first man ___ on the moon..