Science and technology have in important ways to the improvement of agricutural production.A．attachedB．assistedC．contributedD．witnessed 题目和参考答案——青夏教育精英家教网——

题目内容

Science and technology have __________ in important ways to the improvement of agricutural production.

A．attached

B．assisted

C．contributed

D．witnessed

C

试题分析：句意：科学技术在提高农产品的产量上作出了重要的贡献。attach …to 把… …附加在……上；assist帮助；contribute…to作贡献于；witness见证。故选C。
考点：考查名词在语境中的应用辨析。

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