1. Sea turtles _______ important to Taiwan’s oceans because they help keep coral reefs healthy. a b c d

1. are
2. have
3. is
4. have been

2. Lily loves to help people and has _______ all over the world to improve human rights in many countries. a b c d

1. travels
2. traveled
3. travel
4. traveling

3. My roommates have _______ three student art shows since the school year began. a b c d

1. organizing
2. organize
3. organized
4. organizes

4. He _______ at a gym nearby the university 16 hours a week. a b c d

1. work
2. works
3. has worked
4. working

5. Have you ever _______ about going to Australia on a working holiday? a b c d

1. thought
2. been thinking
3. thinking
4. think