阅读下面短文，掌握其大意，然后从21—35各题所给的四个选项（A、B、C、D）中，选出最佳选项，并在答题卡上将该项涂黑。
Mary’s parents are different from the average. While she was growing up they required her to 21. First of all she had to work around their home. Later on Mary worked for other people.
When Mary was 14 years old, her mother and father told her that they were no 22 going to buy her clothes. Sure, they would continue to buy shoes for her and also the special clothes like suits, but 23 else was her responsibility. Some people thought that they were 24, but they wanted to teach Mary some 25 lessons. One thing she learned was that nothing is cheap or 26. She learned how to deal with her money carefully. Another thing she learned was 27 to keep from wearing out(穿破)her clothes too fast.
Also, even 28 Mary went to school she was 29 to work. All through her high school and 30 years she worked as well as studied. Mary’s parents had plenty of 31 but they felt she would 32 her education more if she had to 33 it. And strange as it may seem, they had heard that students who worked part- time generally got 34 grades than students who did no work.
Now Mary is a mother herself. She requires her children to do the same 35 she did, especially working part- time as they go to school.
21．A．study B．play C．learn D．work
22．A．longer B．money C．any D．hope
23．A．what B．that C．nothing D．everything
24．A．responsible B．lazy C．poor D．careless
25．A．difficult B．daily C．valuable D．useless
26．A．free B．expensive C．useful D．proper
27．A．how B．when C．why D．where
28．A．when B．as C．until D．since
29．A．permitted B．required C．going D．forced
30．A．hard B．work C．happy D．college
31．A．time B．children C．money D．work
32．A．value B．have C．use D．receive
33．A．enjoy B．pay C．pay for D．enjoy
34．A．worse B．better C．more D．less
35．A．as B．what C．which D．like