— I think Paul is _______ a careful person that he seldom makes mistakes.— But this time he did. He was _______ nervous that he made a tiny mistake.
--- Listen! David is talking happily with his mother in the next room. --- It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.
--- Have you got the e-mail I sent you this morning? --- I found an e-mail in my mailbox, but it wasn’t ______ you.
—Would you please help me with my drawing? —_____. You can come to my workroom every Saturday.
—Do you mind my closing the window? .—_____. It’s much too noisy outside.
—I seem to be lost. Could you tell me _____? —Sure. You can take the No.3 bus to get there.