As we stood on the top of the hill, we could see the beautiful  scene that ____ before us.   [ ]

A. had spread                      

B. has spread    

C. spread                            

D. spreads

右心衰竭的主要表现不包括（）

A、肺水肿

B、体循环充血

C、咳粉红色泡沫痰

D、呼气性呼吸困难