Limited natural resources should be made full use of ______ the ______ need of energy. [ ]

Ma Yun, head of Alibaba, is one of ________ persons in the world.

The advisor_____ she went for advice is very famous.

Why are you still busy with your homework? You _____ it hours ago.— Sorry, dad. I haven’t been feeling well since early evening. [ ]

It took her a long time to ______ the skills she needed to become a famous player