This robot is supposed to save a lot of labor, but it remains a problem if it ______.
He wrote his ______ novel when he was ______.
—I don’t know when ______ tomorrow.—I will call you as soon as he ______.
—I’m sorry for stepping on your toes.— ______.
—______ a nice day!— ______.
______ girl who will perform at the party tomorrow comes from ______ European country.