1.they got lost because they didn't have a map -> had.............................................................. 2. mary failed to understand how serious her illness was until she spoke to the doctor. ->not until........................................................ 3.he never suspected that the money had been stolen. ->at no time...................................................... 4.the plane had hardly left the airport when the accident happened. ->no sooner.................................................... 5."how many students were absent in your class yesterday,quang?" ->i asked......................................................... giup mình với. thanks mn.