<I>
1. B. Massage
2. D. Role
3. A. Wanted
4. C. Parade
5. B. Economic
<II>
1. A. Protect
2. C. For
3. A. Landslide
4. D. All are correct
5. B. Meaningful
6. C. Chemist
7. D. B and C are correct
8. A. Replace
9. C. Although
10. B. I'll give it to you
<III>
1. Are sitting
2. Had (already) started
3. Using
4. Are
5. Hasn't met
<IV>
1. Scientist
2. Development
3. Renewable
4. Impolite
5. Gradually
