When forbidden to surf the Internet, teenagers often __________ it, saying that it provides them with colorful entertainments, a convenient means of communication as well as useful information.
31. They demanded that the books __to the school library at once.
30. He insisted on going abroad to have further study ____ his parents objection.
29. ____ time and labour, you should join hands ____ him in the business.
Many students signed up for the _____ race in the sports meeting to be held next week.w
27. Johnson ____ for 5 years for political reasons when he was young.