问题
选择题
With so many difficult problems ______, the manager felt worried all the time.
A．settled
B．having settled
C．settling
D．to settle
答案
答案：D
考查with的复合结构，with + 宾语 + to do 表示的将来，句意：有如此多的难题要解决，经理一直感到很担忧。问题还没有解决，所以选D。