Waiter: Excuse me, may I take your order now? Customer: ____ Waiter: No problem. You can take your time, and I will come back in a few minutes. (A) Oh, no, sorry, not yet. We haven't decided what to eat. (B) How delicious it looks! I can't wait to eat it! (C) Yes, I'd like to say you are a polite waiter. (D) Could you bring us the bill?
If you want to keep your computer from being attacked by new viruses, you need to constantly renew and _______ your anti-virus software.
(A) confirm (B) overlook (C) esteem (D) update