The old lady () and fell from the top of the stairs to the bottom.

A. resort to the production mode of our ancestors
B. offer higher wages to the workers and employees
C. enable man to fully develop his potentialities
D. take the fundamental realities for granted

A. try to benefit from both financial and technical resources
B. break up his partnership with the East once profits are made
C. keep a tight told over hi-tech development and marketing of airliners
D. collaborate with Asian partners for a short time