please tell me why they are errors!!

2006-10-23 5:07 pm
Candy manufacturers applauded th discovery by
researchers that students "which" smell chocolate
while studying again while taking a test are able to
recall more meterial than students not exposed to the
odor of chocolate.

2)
The department of transportation has introduced pictorial
traffic signs because drivers can react to "this"
more quickly than to verbal ones.

" "means the word is error

回答 (2)

2006-10-23 5:28 pm
✔ 最佳答案
第一個的which 應該用who,因為which 是用在物件上。
第二個的this應該用these,因為traffic signs是眾數。
2006-10-23 5:33 pm
1. 應該用"who"因為係用在人-"student". ”which”是用在死物的.
2. 應該用"these"因為"traffic signs"係眾數


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