... costly,………………… I traveled by bus instead. (so that, so, that, since)36. …the old man has never traveled by plane before, he is not worried or afraid. (Thus, Therefore, Although, Because)37. Hanh can’t ... The working mother enjoys the traditional Mother’s day custom of breakfast cooked by her family and served to her on a tray in bed. Later in that day, it’s also traditional for the extended ... The_____________________________________________________________________________ 9. Don’t open the door. There is a red sign of “Danger” on it.2 Name: Class: 9a EXERCISESUnit 8I. Choose the best answers1. The man……………...