I found a boy _________ in the corner of the street on my way to the supermarket.

please pass the key _ _ the lock. —oh! Is it a set _ _ keys?[ ]

I went to the classroom to close the door yesterday. But as soon as I was _______ to the classroom, I found it already _______.

Who’s that over there, Is it Jane?—No, It ________ be Jane. She is ill in hospital today.

What does he_________ ?Can you _________ me?—Sorry, I don’t know.