2. 外语
  3. There is a speculation that increasing cold weather was what many have been responsible for the Anasazi move for Mesa Verde to s

There is a speculation that increasing cold weather was what many have been responsible for the Anasazi move for Mesa Verde to s

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问题 There is a speculation that increasing cold weather was what many have been responsible for the Anasazi move for Mesa Verde to sites in other canyons.
选项 A、that increasing cold weather was what may have been
B、whether increasing cold weather was what was
C、that increasingly cold weather was what had been
D、whether increasingly cold weather may have been what was
E、that increasingly cold weather may have been
答案E
解析 A、B、C、D最致命的错误在于：what从句属多余。可以用简化句子的办法来证明这一点，把that从句简化：weather was／had been／may have been what从句+responsible for sth．。从语法角度和句意上来分析，在be+()+responsible for结构中，()部分只可能是副词，而不可能是名词，而what从句却只相当于名词，而绝不可能作副词，因而A、B、C、D中的what从句属多余。同时，A、B中的现在分词increasing在此处只能修饰weather，意思显然不通，应改为increasingly修饰cold，才符合原意，也符合逻辑。D中whether用错(此处是同位语从句，仅能用that引导)；C中，increasingly与was搭配是不妥的，increasingly暗示一正在发生的动作。
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