After being laid off, he was reduced to himself to plant vegetable on the farm.
A. hiring…out
B. catching…on
C. splitting…off
D. taking…up
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(答案→)A. hiring…out
B. catching…on
C. splitting…off
D. taking…up
解析：动词短语辨析。Hire out受雇；catch on变得流行；split off分裂，分离；take up占据，从事于，开始做；句意：被解雇以后，他已经沦落到受雇在农场里种蔬菜的地步了。根据句意说明A正确。