--Haven't you seen Mr. Wilson at the lecture? --Yes, but he had left _________ I could ask him any questions.
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.