__________ is even more important is _________ the earth cooled down, water began to appear on its surface.
There is Liu Chang in our class, but I’m afraid he isn’t one you want.
– What’s Joan dong? -- ______ newspapers in the room.
– Mary didn’t attend the lecture, did she? -- Yes, she ______.
– Will you waste your time and money on that? -- Certainly _______.
Although ______ to stop, he kept on working.