問題詳情：
— It's said a pianist will perform at Poly Theater on Friday evening. Is it Lang Lang?
— Yes, it _______ him. He _______ for a week.
A. must be; has arrived here B. maybe; has been here
C. must be; has been here D. maybe; has arrived here
【回答】
C
知識點：動詞時態
題型：選擇題
