21. I know one dollar is nothing to you, but I insist on paying you back — it is a matter of _____.
A. principle B. finance C. freedom D. confidence
22. Elizabeth is only 1.52 meters tall, which will be very much to her if she wants to be a dancer.
A. shortcoming B. shock C. disadvantage D. identity
23. Don’t waste your words any more; she is as ______ as a mule (骡子) and no one can persuade her.
A. grateful B. stubborn C. sincere D. extreme
