made, were making ,were made ; in,to,on Experiments_______to adapt this variety of shrimp _____ fresh water.

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问题 made, were making ,were made ; in,to,on
Experiments_______to adapt this variety of shrimp _____ fresh water.

选项

答案were made,to

解析 句意:人们进行了一些试验来使这种虾适应于淡水。谓语动词make与主语experiments是逻辑动宾关系,应用被动态。adapt to(使适应于),考查动词和介词的固定搭配,教材P377有举例。答案为were made,to。
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