相關PleasetellmewhatIsai的文學知識

問題詳情：—PleasetellmewhatIsaidjustnow?—Sorry，Mr.Li.I__________thebirdsinthetreeoutsidetheclassroom.A.watched        B.amwatchingC.waswatching   D.havewatched【回答】C知識點：動詞時態題型：選擇...