-----IsawBettygotoGrandpaZhang’shomejustnow.         --...

問題詳情：

-----I saw Betty go to Grandpa Zhang’s home just now.

           -----Yes, she is often seen ______ the old man with his housework.

A. help                      B. to help        C. helps                 D. helped

【回答】

B

知識點：非謂語動詞

題型：選擇題