What is even more important is______ the earth cooled down, water began to appear on its surface.
. The doorway is low, so ____ your head when you go in.
. Because her family is too poor, she has to ____ on her uncle for further education in the university.
. — Were you nervous while being questioned by the police? — Yes, my heart was ____ wildly then.
. — I’d better ____ now. The water is boiling in the kitchen. — Good-bye.
. If we can’t afford meat, we shall have to ____ with fish.