science and technology have important ways to the improvement of agricultScience and technology have____in important ways to the improvement of agricultural production.

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• science and technology have important ways to the improvement of agricultScience and technology have____in important ways to the improvement of agricultural production.
• Science and technology have ___A_____ in important ways to the improvement oA) attachedB) assistedC) contributedD) witnessed为什么不能选A?
• Science and technology have____in important ways to the improvement of agricultural production.应该用contributed还是attached?
• Science and technology have ___A_____ in important ways to the improvement o
• Science and technology have____in important ways to the improvement of agricultural production.
• science and technology have important ways to the improvement of agricult
• It's not allowes to pick the flowers.(保持原意)You _____ ______the flowers.______ ______the fiowers.一格一词!
• 帮忙写一个英文小作文,感谢信（Letters of Thanks）根据这段要求写：Your supplier,Mr.Harry Johns,invited you to dinner last night.Now you are going to write a letter to expiess thanks for his hospitality and tell him that you value the long-established relation-ship with his company and look forward to increasing business in the coming years.格式我晓得,请拟出正文就好了,