問題詳情:
—Has your friend completed his design?
—Not yet. He _______ on it last night.
A. worked B. has worked C. is working D. was working
【回答】
D
知識點:動詞時態
題型:選擇題
問題詳情:
—Has your friend completed his design?
—Not yet. He _______ on it last night.
A. worked B. has worked C. is working D. was working
【回答】
D
知識點:動詞時態
題型:選擇題