21. Mary got _______third degree burn ,____ burn that was incurable.
A. a；a B.a；the C.the；a D.the; the
22. —— Shall I give you a ride to the airport ?
—— Thank you. _______________.
A. If you like B. It couldn’t be better C.Of course, you can D. It’s up to you
23.______ confidence resulted in his failure in the interview.
A. Lack of B. Lack for C. Lacking of D. Being lacked
