Every man has his faults. We should, therefore, learn to be ______ of others.
The evening news comes on at seven o’clock and ______ only thirtyminutes.
----- Must I turn off the gas after cooking? ----- Of course. You can never be ______ careful with that.
He told me he had been offered a well-paid ____, but he refused it.
He has written a lot of books, but ______ good ones.
Everyone here will thank the firefighters for the things they do to prevent fires ______ the environment safer.