---How is Susan? ---Oh, she lives abroad, so I ______ ever see her.

Mrs Smith has a cute baby. It often smiles at people ________.

There is ______milk in the bottle. Let’s go to buy some.

—I don’t know much about computer.—I don’t know,      . Let’s go and ask our computer teacher for help.

English is          too difficult for me. I can't learn it well.