China supplies more than 90 percent of the world’s rare earth metals, but its reserves only ________ about one-third of the world’s total.

It is______ a sharp knife ______I can use it to cut open a hard pumpkin.[ ]

_______ is the farm from here?—About twenty kilometers. [ ]

You are a little___. I’m afraid you should do sports every day.

If you want to speak English well, it’s ___ for you to practice as often as you can.