Their younger peers had a bit more luck, beginning their careers in years when tightening labour markets had pushed up wages. Until, that is, the covid-19 pandemic upended many of their lives. 请问一下老师,这个that is在这里是干啥的?
()images out of clay,stone,and metal.A The shaping of sculptureB Sculpting the shapesC To shape sculptureD Sculptors shape参考答案说缺主谓语 选D 我不懂 怎么缺主谓语了呢 那IMAGES 和out of 又是什么呢