a.shaking b.shaken
c.shocked d.shook
4.the scientist knew nothing about the matter,because he was always________himself in his study.
a.burying b.devoting
c.focusing d.concentrating
5.this book gives a brief________of the history of the castle and details of the art collection in the main hall.
a.outline b.reference
c.article资源难易程度:★★★★★★★★★★★★★★★
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