答案说把which改为as

更新时间2018-08-14 19:47:00

I gave that boy so difficult a math problem which he couldn't work out

which对吗？

as 的话有因此 以至于的意思。so。。as。。。如此。。以至于。不过which应该不能算错

which没法指代宾语补足语，所以要改为加逗号+as

保证没错

貌似，可以在小猿搜题上，进行询问