请教两道语法题，谢谢指点

sabrina_y

1.The most important chemical catalyst on this planet is chlorophyII,____carbon
dioxide and water react to form carbohydrates.

A.Whose presence
B.which is present
C.presenting
D.in the presence of which
请问为何选D而不选C

2.The United States census for 1970 showed that the French-speaking residents of

Louisana were one of the country's most compact regional linguistic minority.

请问为何 minority 错了?

hsyeng

因為需要conj 應該由BC選 但後面為完整S+V 所以要選 prep+which

爱无伤

1.The most important chemical catalyst on this planet is chlorophyII,in the presence of which(chlorophyII) carbon
dioxide and water react to form carbohydrates.

有了chlorophyII的存在，二氧化碳与水才能发生反应生成碳水化合物。

选C是什么意思呢？

2.是不是应该是minorities? one of the most ...minorities?

hsyeng

同意 第二題 one of 複數n

hsyeng

我寫錯啦 第一題昰BD選