選出正確的答案: A: ______________ start playing the piano? B: ___________ I was five. I've played for twenty hears.
(A)How long have you; since(B)When did you; when(C)When did you; Since(D)
B中文解釋: A: 你幾歲開始學鋼琴的? B: 當我五歲時。我已經彈了二十年了。 詳解: A的問句有start playing，「開始」是一個瞬間動詞，因此這個問句需用過去式 "When did you start playing the piano?"，而答句要回應開始的時間，也要使用過去式時間副詞，故需使用when I was five。故選(B)。