I have to work hard _____ the test.
When I wrote the letter, I kept __________ the words ___________.
--- When will you father _________ in Japan? --- Sorry, I don’t know.
When the bus stopped, some people _______ the bus and some others _________.
The trip to the World Park __________ almost two hours and it was _________.
--- Why were you late for the show? --- It was rush hour. There was _______ traffic on the road.