5. -----Could I borrow your dictionary? ------Yes, of course you______.
—Are you satisfied with her work, sir?—Not at all. It couldn’t be any _______.
—You know our manager has been in hospital for days?— Yes. I wonder if he is ____ better now.
When you cross the street, you can never be _______ careful.
—I always close all the windows before I sleep. —You’re right. You can not be too ____.
He’s _______ working in Germany as a representative of a Chinese company.