2013高考英语二轮抢分小专项强化训练13
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. --To my disappointment, the experiment was ______ complete failure.
-- Don't lost ______ heart, John. Failure is the mother of success.
A. /; / B. /; the C. a; / D. a; the
22. It is reported that there was an air crash in Cuba. Nobody on board ______ it with all the passengers and the crew killed.
A. avoided B. escaped C. missed D. survived
23. With the development of the Internet, people in China can enjoy more ______ of speech. They can now make comments on the government according to the law.
