—Must I turn off the gas after cooking?—Of course.You can never be ________ careful with that.

 I think it was a bit boring to work here because there wasn’t always      much to do.

She felt ________ awkward because of her bad performance on the stage.

Last night Mr. Crook didn’t come back at the usual time. ______, he met some friends and Stayed out until midnight.

He found it hard for Alan to focus on his teachers for longer than five minutes, _________ if the lecture was boring.