选择题:The man loves nature and the soil. That is why he

题目内容:
The man loves nature and the soil. That is why he has bought a piece of land in the country and __________ to grow his own vegetables. 
(A) taken the difficulty
(B) had the trouble
(C) had the difficulty
(D) taken the trouble
参考答案:

随着工资水平的提高(A)劳动的供给量一直增加(B)劳动的供给量先增加,但工资提高到一定水平后,劳动的

随着工资水平的提高(A)劳动的供给量一直增加(B)劳动的供给量先增加,但工资提高到一定水平后,劳动的供给不仅不会增加反而会减少(C)劳动的供给量增加

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