(    )21.As the saying goes, “If you want to do anything well, believe in yourself first.” It is such _____ useful suggestion that you’d better keep it in mind.

        A. a                  B. an                 C. /

(    )22.—Mom, I god the first prize in the speech contest.

—Wonderful! _____ it is!

        A. What a good mews   B. How good news      C. What good news

(    )23.—When one door of happiness closes, _____ opens.

—That’s true. But often we look so long at the closed door that we don’t see the one, which has been opened for us.

        A. other               B. the other            C. another