______to train his daughter in English,he put an ad like this in the paper,“______, an English teacher for a ten-year-old girl.”
5. Honest ________, though unpleasant to the ear, induces good conducts. (prov.)
6. We haven't seen each other for _______, though we are in the same city.
7. Our older generation used to advise us not to build ____ in the air, but that’s not realistic at all.
8. Usually passengers are required to arrive at _____ one hour before ______ takes off.
9. Which of the following is not a flying machine?