The train station is about ______ bike ride from the post office.

How about ____ Christmas evening party? — I should say it was ____ success.

I feel it hard to keep up with my classmates. But whenever I want to _______, my teacher always encourages me to work harder.

Mr. Smith __________ is smoking is looking for________ she lost yesterday. [ ]

Helen, do you know if Martin _______ to my party next week?——I think he will come if he ______ free.