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2014公共英语PETS四级完型填空练习题
EXERCISE 10
We know we have to read "between the lines" to get the most out of anything.Making up is also a useful practice,_1__ you shouldn't mark up a book which isn't yours.Librarian who_2__ you books expect you to keep them clean,and you should .If you decide that I am right about the usefulness of marking books,you will have to _3__ them.
