One should remain ______ and think of ways to escape when facing danger.

I’m in a hurry. You’d better tell me the truth _______.

Fortunately somebody who happened to be passing by called the emergency aid        the traffic accident occurred.

The committee is discussing the problem right now. It will_____ have been solved by the end of next week.

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