21. --Joe is playing ping-pong against Harry tomorrow.
--________, but I don’t think he has much chance of winning.
    A. That’s all right  B. I don’t think so     C. I hate to say it     D. It doesn’t matter
22. Now ________ nationwide campaign has been launched in China to encourage people to adopt ________ low-carbon lifestyle.
    A. a; the          B. a; a             C. the; the           D. the; a
23. Everything changes. Do not ________ situations or people to stay the same for very long.
    A. encourage      B. imagine          C. intend           D. expect
24. Don’t throw away the old clothes. Give them away to ________ needs them.
    A. whomever      B. whoever         C. what             D. who
25. With prices ________ going up, it is sometimes difficult for us to make ends meet on our small income.
    A. keeping        B. kept             C. to keep          D. being kept
26. Painful ________ they are, regrets can actually spur us on to future success.
    A. as            B. if                C. when            D. while