[文法] 想請教研究所的考題
各位版友好 :
小弟遇上了些困難,是文法觀念的題目,想破頭都無法有合理解釋>"<
(1)When I ____ the windows , I sat down and had a cup of coffee.
(A)had opened (B)have opened (C)open (D)opened
先將B與C刪去,我以為這是簡單過去式,結果答案卻是A
為什麼D無法解釋 ???
(2)Once researchers have obtained information about the chaotic system,
they can begin to use chaos to their advantage.
^^^^^
這裡有困惑的地方是,不瞭解底線部分該如何解釋
麻煩大家了 >"< !!!!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.120.19.4
推
02/04 16:56, , 1F
02/04 16:56, 1F
→
02/04 22:14, , 2F
02/04 22:14, 2F
→
02/04 22:14, , 3F
02/04 22:14, 3F
→
02/05 11:16, , 4F
02/05 11:16, 4F
討論串 (同標題文章)