【题目】Science and technology have ______ in important ways to the improvement of agricultural production.
A.attachedB.assistedC.contributedD.committed
在线课程【答案】C
【解析】
考查动词词义辨析。句意：科学技术在很多方面促进了农业生产的改善。A. attached把……固定，把……附在……上；B. assisted协助；C. contributed捐献；D. committed承诺，保证。contribute to sth：有助于，促成。故选C。