Modern agriculture has greatly developed and nowadays animals are usually raised in______we call factory farms. As a result of this, lots of labour is saved.A.whichB.whereC.whatD.how
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C解析句意“现代农业有了很大的发展，现在，动物被喂养在所谓的工业农场里。这样带来的结果就是，节省了大量的体力劳动。”in后是宾语从句，从句中的call缺少宾语，故用what。故选C。