6. In line 15, the word "this" refers to ...
A. building a road them
B. sending a drilling team
C. gathering the crude oil
D. sending exploration teams
E. sending exploration machinery
7. In line 13, the word "they" refers to ...
A. people
B. exploration teams
C. finished product
D. oil companies
E. harsh conditions
8. The main idea of the first paragraph is that ...
A. oil has changed a great deal of things
B. kinds of oil for transportation
C. the importance of transportation
D. motor vehicles using gasoline
E. further processing of oil
9. Exploration teams, sent by oil companies, have to go to remote places. The word "remote" in the sentence above means...
A. busy
B. near
C. far away
D. crowded
E. close
10. "... which was carrying staple food that sank in waters off the coast of Bangka Belitung...
What does the underlined word mean?