--- The accident might not have happened , had we been more careful . --- But we _______.
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.
It was because I didn't attend the meeting ______ I had no idea about the matter.