从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. ---Goodbye, Mary．Please remember me to your parents．
--- _________．
A．My pleasure B．That’s all right
C．Thanks, I will D．What a good idea
22. The Smiths prefer a house in the country to spend their late years to____ in a large city.
A. one B. it C. those D. this
