Question

—Alice, you look puzzled．Haven’t you understood it? 

—Yes．I _____of another problem just now．

1. A.
   had thought
2. B.
   have thought
3. C.
   thought
4. D.
   was thinking

Answer 1

D
考查時(shí)態(tài)，過(guò)去某一時(shí)刻正在進(jìn)行的動(dòng)作應(yīng)用過(guò)去進(jìn)行時(shí)態(tài)，根據(jù)題中的時(shí)間just now，故用故去進(jìn)行時(shí)態(tài)。句意：艾麗斯，你看起來(lái)很困惑，你沒(méi)明白嗎？是的，我剛才在想另一個(gè)問(wèn)題，故選D。