A. There exists no single solution to solve all communities' problems.

B. Not communities share the same problems, hence no single solution.

C. All communities have their own needs but require the same solution.

D. There is no one solution to meet the needs of all communities.

A. The education itself has been considerably impacted by volunteering activities.

B. The impact of volunteering on the education system itself is worth considering.

C. There is a considerable impact of volunteering on its education system itself.

D. It is the volunteering activities that have considerable impact on education.

A. A contribution from volunteering to the economy has been significantly made.

B. The economy all around the world benefits significantly from volunteering.

C. Volunteers around the world have made significant contribution to the economy.

D. Volunteering has significantly contributed to the world economy in all sectors.

A. Nobody thinks it is meaningless to loose money for charity work.

B. Saving some pocket money for charity work is a meaningful thing to do.

C. It means that we have to save some pocket money for charity work.

D. We mean to save some pocket money for charity work.

A. The study attracted nine volunteers to take part in.

B. They recruited nine volunteers to takepart in the study.

C. All the nine recruited volunteers took part in the study.

D. The recruitment of nine volunteers helped the study a lot.