I explained the theory as clearly as possible, ________ to make it easy ________．

1. A.
   hoping; understood
2. B.
   to hope; to be understood
3. C.
   hoping; to understand
4. D.
   hoped; understood

I explained the theory as clearly as possible , ________ to make it easy _______．

A．hoping; understood                               B．to hope; to be understood

C．hoping; to understand                                   D．hoped; understood