The Nile River ____ flood large areas but now the water ____ produce electricity

______ young people see and hear in themedia helps them to figure out how the world works．

The computer system _______suddenly while he wassearching for information on the Internet

I think it’s not in the length of days, but in the use we make of them_____ the value of life lies.

_______ did your uncle leave his hometown – He _______ for nearly twenty years.