The following sentences, which were lifted from The Economist, were edited to show other common sentences error-agreement, split infinitives, sexist language, sentence length. Rewrite thee items to correct the errors.
1. Some studies finds that in developing countries every ten extra mobile phones per 100 people increases the rate of growth of GDP per person by more than one percentage point.
2. But in eight short years smartphones have changed the world- and it have already begun.
1. Some studies find that in developing countries, every ten extra mobile phones per 100 people increase the rate of growth of GDP-per-person by more than one percentage point. 2. But in eight short years, smartphones have changed the world — and they have hardly begun.