Yesterday when I got to the station, the bus _______. I missed the bus, so I was late.
(A) had already left (B) has already left
(C) were leaving (D) is leaving
(A) had already left 過完
＊got to 抵達是過去式，到達車站時公車早已經離開了，故用過完。
Peter’s wallet was stolen while he _______ for the bus. (A) had waited (B) have waited
(C) was waiting (D) is waiting
(C) was waiting
＊while＋進行式，因為while強調的是當...發生的那段時間，強調動作當時正在進行。
______ Susan _______ her sister are busy preparing for the test tomorrow.
(A) Neither; nor
(C) Either; or
(B) Not only; but also (D) Both; and
(D) Both A and B + 複數動詞
A dog ______ onto the train while I was riding on
the MRT this morning. (A) was walked (B) walked
(C) has walked (D) had walked
(B) walked
＊ 過簡 when/ while 過進
