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1£®£¨2010·°²»Õ°ö²º¶þÖиßÈýÉÏÆÚÖп¼ÊÔ£©23. With so many programs ____ online for free, there is no excuse no to make use of them. 

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2.£¨2010·°²»Õ¸ßÈýÒ»ÂÖ¸´Ï°ÃûУÁª¿¼£©22£®Duffield White, _____ of Russian at Weslevan University, said that he was one of the youngest winners of the prize£®ÊÀ¼Í½ð°ñ

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3.£¨2010·°²»Õ¸ßÈýÒ»ÂÖ¸´Ï°ÃûУÁª¿¼£©35£®Her team failed in the competition£®She is trying to get to the ____ of why some members gave up midway£®

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