We are confident that the environment ________ by our further efforts to reduce pollution

She bought the same skirt at a lower price at the same shop where I bought mine because she was a __________ customer.

I ________ great contributions to science cause.

Einstein’s Theory of Relativity was so __________thatfew people could understand it at that time.

47. She was disappointed _____ hearing thenews that Chinese football team lost the first match in “World Cup”.