1.Now we are in a position ----we have to work as we are tol

1。C 关系副词 ,因为 从句还原应该是 we have to work as we are told to at the position。所以不能用that,用at which倒是可以的2。C it's useless doing sth。固定句型,做某事没有用处 再问： 追问可是第二题不是虚拟语气么，应该变成现在完成时啊 再答： 如果你用从句，那么确实是虚拟语气，但是你现在用的不是从句，是分词，所以用doing。 用虚拟语气后面应该用sb。 (should) do。