[单项选择]Text One 　　A. accelerate B. otherwise C. between D.imitate 　　 Phrases: A. would be difficult to 56 B. from 57 its feathers C. enabling the bird to 58 D. it 59 could The emperor penguin traps air in its feathers. Not only does this insulate thebird against extreme cold but it also enables it to move two or three times fasterthan60How Marine biologists have suggested that it does so byreleasing tiny air bubbles 61 .As these bubbles are released, the reduce friction on the surface of the penguin’s wings, 62 . 　　Interestingly, engineers have been studying ways to make ships go faster byusing bubbles to reduce friction against their hulls (船身 ) . However, researchersacknowledge that further investigation is challenging because "the complexity ofpenguin’s wings 63

[单项选择]Text One 　　A. accelerate B. otherwise C. between D.imitate 　　 Phrases: A. would be difficult to 56 B. from 57 its feathers C. enabling the bird to 58 D. it 59 could The emperor penguin traps air in its feathers. Not only does this insulate thebird against extreme cold but it also enables it to move two or three times fasterthan60How Marine biologists have suggested that it does so byreleasing tiny air bubbles 61 .As these bubbles are released, the reduce friction on the surface of the penguin’s wings, 62 . 　　Interestingly, engineers have been studying ways to make ships go faster byusing bubbles to reduce friction against their hulls (船身 ) . However, researchersacknowledge that further investigation is challenging because "the complexity ofpenguin’s wings 63

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One of the advantages of taking notes is that it forces you to pay closer attention to the class lecture. If you listen (26) to a professor who is talking on and on for an hour or so, your mind will often (27) and your attention lessen. You arc sitting in class and listening, but that (28) you are doing; (29) when you listen actively you have to pay more careful and (30) attention to what (31) . This is because you are trying to (32) what you bear into an (33) , shortened written form. As a foreign student, you may find (34) very difficult to listen and write notes (35) at the same time. It is difficult (36) , but you will learn how to do (37) with practice. You (38) afraid you will forget what you are listening to (39) you are listening and writing at same time, but the studies of researchers (40) the value of note-taking in (41) lecture material h
A. some
B. that
C. any which
D. it