阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
Rest is critical to life and work and a positive attitude towards rest needs to be maintained. Enough rest is significant to our body and mind 1a lack of adequate rest, as well as __2__ attitudes to rest, will do great harm to our health.
Rest is vital to our ability to 3at our best. Recent news stories report that scientists are learning surprising things about the importance of sleep. There is enough __4_ suggesting that rest will refresh us, 5our body and mind to work efficiently. Besides, rest is important for 6that; it is helpful in setting 7goals and deciding what goals to attain first. Those who are caught up in extremely busy lives 8the time to think about what they are doing and to make objective 9, which blocks the maximization of their 10.
On the contrary, lack of adequate rest damages brain function, so much so that sleep experts have been able to 11drops in IQ in patients who are 12of sleep. Other studies have presented a negative effect on body movements in sleep-wanting subjects. It should not, therefore, be a 13that the California Highway Patrol has stated that sleep-wanting drivers are as great a 14to road safety as are drunken drivers.
However, rest is widely 15by some people. Instead of sleep, they go to pubs and clubs 16what they call social drinking or having a smoke with friends and they 17__ that this kind of entertaining is rest. Nowadays, the economy forces people to drink and gamble for the sake of the 18one moves in. The truth is that rest means not using our _19both physically and mentally, even spiritually. We need to rest correctly and 20; otherwise, tiredness and illness will occur.
1.A. when B. though C. until D. while
2.A. critical B. misleading C. puzzling D. ambiguous
3.A. survive B. create C. function D. advance
4.A. evidence B. theory C. belief D. information
5.A. encouraging B. enabling C. persuading D. concentrating
6.A. more than B. rather than C. other than D. less than
7.A. ideal B. appropriate C. professional D. high
8.A. afford B. expect C. lack D. waste
9.A. comments B. complaints C. attempts D. decisions
10.A. potential B. limit C. vision D. goal
11.A. predict B. evaluate C. measure D. assume
12.A. short B. afraid C. full D. tired
13.A. fact B. warning C. rule D. surprise
14.A. burden B. reminder C. threat D. blow
15.A. accepted B. valued C. abandoned D. misunderstood
16.A. with B. like C. as D. for
17.A. claim B. suggest C. announce D. promote
18.A. traps B. circles C. mysteries D. power D. troubles
19.A. judgment B. time C. labor D. power
20.A. completely B. partly C. sufficiently D. permanently
We all need knowledge from the past — ______ it comes from personal experience or from studying history. It is our only guide to the future.
A. as B. whether C. how D. when
The patient has tried quite a few kinds of medicine, but ______ had any effect on his disease.
A. none B. nothing C. neither D. no one
I wouldn’t eat potatoes unless I’m really starving, in _______ case you eat almost anything.
A. whose B. one C. what D. which
One of the consequences of our planet’s being warming up is a(n) ______ in the number of natural disasters.
A. account B. reason C. increase D. occurrence
World Expo 2010 Shanghai China, a grand-scale global event, has ______ the significant theme “Better City, Better Life.”
A. abandoned B. adopted C. advocated D. adapted
