I can spare you only a few minutes. Just tell me ____what happened.

Because of the rise of sea level, some islands will disappear. _____ people of certain countries will have to look for new places to live.

Progress so far has been very good.______，we are sure that the project will be completed on time.

There is still much to discuss. We shall, ____, return to the problem next time.

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