Science and technology have in important ways the improvement of agricultural production.

问题补充：

Science and technology have in important ways the improvement of agricultural production.

A. contributed to

B. resulted from

C. carried off

D. handed over

答案：

(答案→)A. contributed to

B. resulted from

C. carried off

D. handed over

解析：这题考查词组辨析：contributed to导致，resulted from源于，carried off夺走， handed over交付，句意是：科技在一些重要的方面有助于农产品的改善。选A。