Определите видо-временную форму и залог глагола - сказуемого.
пример:
nick drew up an invoice. ник выписал счет.
drew up – past indefinite active от стандартного глагола to draw up.
:
1. economic conditions are changing all the time.
2. in many countries economic development has led to periods of rapid population growth.
3. it will take some time to read this document.