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  3. Several years ago the diet industry introduced a variety of appetite suppressant

Several years ago the diet industry introduced a variety of appetite suppressant

游客2024-01-13  74
问题 Several years ago the diet industry introduced a variety of appetite suppressants, but some of these drugs caused stomach disorders severe enough to have them banned by the Food and Drug Administration.
选项 A、stomach disorders severe enough to have them banned
B、stomach disorders that were severe enough so they were
C、stomach disorders of such severity so as to be
D、such severe stomach disorders that they were
E、such severe stomach disorders as to be
答案 D
解析 本题不属于系表结构，且such不修饰抽象名词severity，因此C不对；A中是“enough…to”，GMAT中不用；B中：“enough．．．so”结构不对，选D：“so…that”；E中有一缺陷，即“as tobe”不能显示具体的时态情况，因而不能像D一样的准确反映“过去已被禁止”。
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