Science and technology have ____in important ways to the improvement of agricultural production.
A．a(chǎn)ttachedB．a(chǎn)ssistedC．contributedD．witnessed
C
本題考查動詞短語。contribute to means: 促成；有助于；對。。。有貢獻。in important ways放在contribute to 之間，增加了題目的迷惑性。
【標簽】動詞詞組的分裂式使用
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