... 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 ... which, when, whose)8. The beach……………………the students are cleaning up the trash is a beautiful one. (where, which, who, whom) 9. The parrot………….can speak some words belongs to my close friend. (who, ... friends are fond of the performing animals……… have just come to town. (which, who, whom, whose) 19. Independence Day is a great holiday……………… people hang up the national flag outside every house....