Did you look up the time of trains to Shanghai? —Yes, the earliest train is _____to leave at 5:

I lost________ key to the door yesterday. It was________ unlucky day for me.

Which of the two English dictionaries will you buy?——I’ll buy ________ of them, so I can give one to my friend Helen.

While Helen ________ the piano，her mother came in．

_____ go boating with the teachers next Sunday? [ ]