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上期复习
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Just as they had been for years, the customary steps were followed—that is, the usual procedures were carried out.1 s/ t D, f- g$ b8 Z, B1 U
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惯例的
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8 _, Q7 Z/ [) k- S D$ YThe animals looked healthy. They exhibited, or ________________, no symptoms of disease.
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+ N1 X% v, b* G. e) r2 W(a) exchanged
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(c) earned
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answer key: d |
发表于 2012-8-15 00:34:18
