“Well done, John! Not a single mistake ________ in your exam paper this time!” said the teacher．

Do you have any plans for this weekend?— I’m not sure. I _____ go climbing Mount Baoshi.

While Helen __________ the guitar, her mother came in.

He has lost his pen. He is _______ it everywhere.

Yes, I do. She __________ Big Sister by us and I am afraid of her.