Research has been limited to ____ production profits, rather than ____ that GM foods are safe.

The water and soil conservation project resulted in farmers ______ the crops on the farmland  _____ trees and grass.

The possibility of peace talks between the two sides ______ whether the demands of various aspects can be met.

The road to the mountain has been _____ by the heavy snow for almost a month.

After the storm, I found the world _______ and the old house ________.