21. Mum, I lost ______ pen my friend bought for me. Could you keep _____ eye out for it when you clean the house?
A. a; an B. the; an C. a; the D. the; the
22. – Have you been wasting time on computer games again?
– _________ . I’ve been studying a lot and I need a break.
A. No way B. Not really
C. I don’t agree D. I couldn’t agree more
