The most important______of the farmers in Iraq is dates, of which Iraq is the world’s leading exporter.

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问题 The most important______of the farmers in Iraq is dates, of which Iraq is the world’s leading exporter.

选项 A、economic crop
B、cash crop
C、money crop
D、staple

答案B

解析 固定搭配。A.economic crop不这样用,“经济作物”应为cash crop;C.money crop不符合英语习惯;D.staple主要产品(或商品),原材料。另:a food crop粮食作物;an oil-beating crop油料作物。
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