Over the past decades, sea ice is decreasing in the Arctic global warming.
| A．as a result of | B．on top of | C．in front of | D．in need of |
It was _____ the old clock that the old man spent the whole morning at home.
| A．repair | B．repairing | C．to repair | D．in repair |
_____ what the six blind men said sounded！
| A．How foolishly | B．How foolish | C．What foolishly | D．What foolish |
How pleased the boy was _____ what his parents said！
| A．hearing | B．heard | C．hear | D．to hear |
Was it _____ she heard with her ears _____ really made her frightened？
| A．what；that | B．it；that | C．that；which | D．what；／ |
Is this factory _____ you visited the other day？
| A．the one | B．that | C．where | D．when |