. Перепишите следующие предложения, определите в каждом из них видо-временную форму и залог глагола-сказуемого. Переведите предложения на русский язык.

1.1. They appraise their employees once a year.
1.2. Economic conditions are changing all the time.
1.3. The large-scale adoption of computer technology has had a dramatic effect on the work of the stock exchange.
1.4. Countries are often described as underpopulated or overpopulated.