填空题 A. if we can drive yield up
B. when Mexico, China and India join in the project
C. if we want to fight against malnutrition and poverty
D. when we use modern technologies and develop new ones
E. when the developed world help the developing world
F. when strategic research can be utilized worldwide

填空题 Dr. Fischer claims that agriculture will continue to develop ______.

填空题 Land can be saved for other purposes ______.

填空题 The investment can be regarded as efficient ______.

填空题 The global decrease in investment should he changed ______.