My mother is always warning me when I go out, “Don’t get off the bus ____ it is stopping.”
It was two weeks before the Spring Festival and the shopping centre was _____ with shoppers.
Leave your key with a neighbor _____you lock yourself out one day.
—Bob has gone to California. —Oh, can you tell me when he ______?
Our plan to ______ a New Year’s party has won supports from our teachers.
There was______time when everything to do with__nature could keep Anne spellbound.