3. Viet Nam is __________ country.
A. an exporting-rubber B. a rubber-exported
C. a rubber-exporting D. an exported-rubber
10. Simon __________ in class for 3 days.
A. isn't B. won't be C. wasn't D. hasn't been
11. These beautiful pictures __________ from recycle paper,
A. made B. make C. are made D. is made
12. Jane said she __________ in the contest.
A. can participate B. would participate C. will participate D. is participating