问题
单项选择题
The most important ________of the farmers in Iraq is dates, of which Iraq is the world''s leading exporter.
A．economic crop
B．cash crop
C．money crop
D．staple
答案
参考答案：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-bearing crop油料作物。
