[問題]賴水信高分托福文法p.369(39)

[Lucy Tsai]

如題:賴水信高分托福文法p.369(39)
..........one time, Tiawan was one of the leading producers of camphor in the world.
(A)Since
(B)At
(C)Before
(D)During答案是(B)是一度的意思,
為何不是(D)?在一個時期期間?
煩請知道的人為我解一下,謝謝
越做到後面,問題就越多...不好意思

[Lucy Tsai]

A time", "One time" 是一個時機點 像是一個瞬間 所以都at
during是用來接一個期間(從某時間到某時間)
像是I ate a lot during the weekend.
It was cold during the ice age.

[maloney]

同意。其實這題用文法結構解題是有點困難的。since當自從解是prep詞性+NP，before也做adv或prep詞性，做prep詞性也是+NP，during也是prep當然也是+NP。at也是prep詞性+NP。所以要如這位大大所言用語意來解題。

A time", "One time" 是一個時機點 像是一個瞬間 所以都at
during是用來接一個期間(從某時間到某時間)
像是I ate a lot during the weekend.
It was cold during the ice age.