_____ about wild plants that they decided to make a trip to Madagascar for further research.A.So curious the couple were \x05B.Such curious the couple were C.So curious were the couple\x05\x05D.Such curious were the coupleWhich one?Why?A or

a
倒装

B 答案是b ，我做过这个题。

A 正常语序为The couple were so curious about wild plants that they decided to make a trip to Madagascar for further research.
整个句子的中心结构为so……that ……结构，如此……以至于
题目中只是为了强调这对夫妇对野生植物好奇，把so curious 提前了。
整个句子的意思为：这对夫妇对野生植物那么好奇，以至于他们决定到马达加斯加去做深入的研究。
不是倒装，so 引导倒装句是用在表示赞同或附和的情况。
So do I. 这样的结构。

答案选A. So curious the couple were ！这里既是考察so或such----that-----的用法，又是考察倒装句。so后面直接接形容词或是副词，这里排除BD，“so+形容词+be动词+主语”,可以理解为一个句式！

不倒装的情况下,应该是The couple were so curious,that.
这里是把so提前了,要倒装,所以应该选C
注意：
so后常跟形容词,such常跟名词
当“so/such ...that ...”结构中的so,such连同它所直接修饰的成分共同位于句首表示强调时,主句要进行倒装(that后面的结果状语从句不倒装).So angry was he that he couldn’t speak.他愤怒得一句话也说不出来.