大全135 ,有个没讨论清楚的疑点!麻烦各位童鞋看看!

zxtcomeo · 发表于 2010-9-17 17:08:56

As recently as 1950, tuberculosis was never curable unless sequestered in sanitariums; today, the drug Isoniazid has made such treatment obsolete.

(A) unless sequestered

(B) without sequestering

(C) without being sequestered

(D) unless it was sequestered

(E) unless patients were sequestered
正确选项为e
我想问的是 unless引导的虚拟语气(有were),则前面的was 应为would be

zxtcomeo · 发表于 2010-9-18 16:15:29

请大家围观答复下!感激不尽

zxtcomeo · 发表于 2010-9-18 22:01:51

有没有人告诉我??????????来围观答下! thankyou

大全135 ,有个没讨论清楚的疑点!麻烦各位童鞋看看!

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