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相关试题
51. The underlined word “It” in Para. 2 refers to ________.
39.
11.The students______busily when Miss Brown went to get a book she______in the office.
33.
63.
62.
8. It took _________people as well as ___________time to build the bridge.
52. What did Brook find when he calculated his own carbon footprints?
58.
53. Brook’s opinion is challenged by the statement that .
49. The best title of the text is ________.
3.People who don't regularly drink caffeine tend to be more_____to its negative effects.