1. ________many times , but he still couldn't understand it . 2. ________many times , he still couldn't understand it .A. Having been told B. Told C. He had been told D. Though he had been told 3. ______from space , the earth looks blue . 4.______from space , we can see the earth is blue .A. Seen B. Seeing C. To see D.See 5. The building ______ now will be a restaurant . 6. The building ______ next year will be a restaurant . 7. The building ______ last year is a restaurant.A. having been built B.to be built  C.being built D. built 

A/D