--Whatwereyoudoingat9o’clocklastSundaymorning?        -...

問題詳情：

--What were you doing at 9 o’clock last Sunday morning?

         --I ________.

        A. did my homework               B. am doing my homework

        C. do my homework                D. was doing my homework

【回答】

D

知識點：動詞時態

題型：選擇題