Questions 19 to 22 are based on the conversation you have just heard.

A．Investing more money in studying the teaching methods of foreign languages.
B．Hiring more foreign language teaching assistants in American schools.
C．Starting earlier foreign language teaching in American elementary schools.
D．Sending more American students to other countries to study their language.

A．To reduce half of the number of people who lack safe drinking water by 2015.
B．To arouse political desire to meet future water demands.
C．To release a report on water development and water problems in the world.
D．To maintain sustainable development of South Africa till 2015.