填空题
A. But I have to work. B. Coffee, please. C. Fine, and you D. May be Joan, E. Thanks. F. Good luck. G. You, too. H. Yes, here you are.
A. there may be other intelligent beings in the universe B. there are other intelligent beings in the universe C. people living on the earth are almost certainly the only intelligent beings in the universe D. people living on the earth are definitely the only intelligent beings in the universe
A. Returning to work or school as soon as the symptoms have disappeared. B. Covering your coughs and sneezes. C. Washing your hands frequently with soap and warn water D. Staying home from work or school at least seven days if you become ill