11. Gymnastics ______ a very difficult sport.
1. an
2. is
3. were
4. are
12. Eighty days _____ not enough to complete this project
l. are
2. is
3. were
4. an
13. We must talk ______ what we can do as a community to reduce pollution in our locality.
1. at
2. about
3. in
4. for
14. To do this job, you don’t have to be particularly skilled _____ anything.
1. for
2. in
3. at
4. an
15. Most of the companies prefer to remain in touch with their clients____ email.
1. by
2. in
3. to
4. for