—Listen! Peter is singing in the classroom!—It _____ be him. He has gone back to his hometown.
—_________ —It was very dry.
—Where is your sister? —She ________ my mom with cooking.
— How can I _________ the bank, please? — You can take bus No. 10.
We had a lot of fun __________ English songs(歌曲).
Our teacher often tells us __________ homework carefully(认真地).