He stopped playing baseball in 1998 his illness.

Look at the sign. You_____ fish here.—Sorry, I didn’t know.

Must I stay here with you— No, you . You may go home, but you go to the net bar (网吧).

Someone who lacks staying power andperseverance is unlikely to ______ a good researcher

More and more people have come to realize that if wehad taken effective measures much earlier, the air quality ______ so seriouslynow.