Why so many students graduate from high school with inadequate skills in reading and mathematics is a question that continues to ______ American educators.

A．Always help those who are in need on the streets.
B．Stop purchasing and save money for the future.
C．Think of the families who are fighting for their child’s life.
D．Look after old parents and young children in the family.

A．Importance of saving water.
B．Ways to improve farming.
C．The city’s nasty weather.
D．Water shortage in the city.