Congress is debating a bill requiring certain employers provide workers with unpaid leave so as to care for sick or newborn children. (A) provide workers with unpaid leave so as to (B) to provide workers with unpaid leave so as to (C) provide workers with unpaid leave in order that they (D) to provide workers with unpaid leave so that they can (E) provide workers with unpaid leave and Ans:D 我选了B 曾听老师讲过 so... as to用于单一主谓 so...that 用于2套主谓,但就是不知道如何实践,请指教。