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以下是引用louisezuo在2003-10-6 19:19:00的发言: another problem 237. Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries. (A) it is so debilitating that it has become an economic (B) it is of such debilitation, it has become an economical (C) so debilitating is it as to become an economic (D) such is its debilitation, it becomes an economical (E) there is so much debilitation that it has become an economical
我选A,不知对不对,本来C也可以,简单的系表结构,但没体现出完成时态。to have become就对了。 |