Do you know the man ________ is reading the book over there?——— Yes, he is Mr. Green, our P.E. teacher.
I usually go there by train. — why not _____by boat for a change. [ ]
They reached Beijing ____ the morning of July 6. [ ]
Why ___ you ____ to school earlier this morning ?
What an _____ question it sounds! Even my daughter can answer it ________.