Seen from space, the earth looks like a blue ball, with ______ 75% of its surface covered with water[ ]

d some fresh air, so I am going out for a walk—________

Helen has got＿＿＿it takes to be a great tennis player．In other words, she has the potential to become world famous.

I found ___________ difficult to make sounds like birds.

The film brings the good cadre (干部) Jiao Yulu ______ on screen.