___ most of the earth’s surface is covered by water, fresh water is very rare and precious.
We should spend as much time as we _______ over our lessons.
It’s _______ much more than I ________ it.
She looked unhappy because she had made ________ mistakes in the English test.
The taxi ________ I usually took to my office was destroyed in a traffic accident?
As he was too fat, he tried several shirts _______ but ____ fitted him.