Mrs．Wang： Hello， Dr．Liu． This is Mrs． Wang speaking．

Dr．Liu： Hello， Mrs．Wang． （1）　　？

Mrs．Wang：I' m worried， so I have some questions to ask you． As we know， these days many people have COVID﹣19．（2）　　？

Dr．Liu ： First， we should exercise often to build us up． Second， （3）　　．Third， we should wash hands often．

Mrs． Wang：（4）　　？

Dr Liu： We must keep away from crowded people． We'd better not go to public places．

Mrs．Wang： Must we go to see a doctor at once when we have COVID﹣19？

Dr．Liu： Yes， we must．

Mrs．Wang： （5）　　． Thank you!