In 1933 the rubber, clothing,and shipbuilding industries put into effect a six-hour workday,not as a temporary expedient but as a seemingly permanent accommodation to what many observers thought was an economy made overproduction by advances in technology.
红色部分是正确选项的代入,其他选项都能排除掉,可是我不大明白accommodation后面what引导从句的结构,如果是做to的宾语,那was就不应该要啊,what 和 economy同时做thought的宾语。这样结构就是 many observers thought what an economy made overproduction by advances in technology.
what many observers thought was an economy made overproduction by advances in technology 是一个what 引导的主语从句,what many observers thought 整句话做主语,what 引导的从句谓语用单数,was, 表语 an economy. what many observers thought was 修饰 an economy 如果省略what 引导的成分,看得更清晰。 not as a temporary expedient but as a seemingly permanent accommodation to an economy made overproduction by advances in technology.