阅读理解。
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
In America, seldom do you go anywhere without hearing a principle called WIN-WIN． 1
However, as time goes by, I have gradually comprehended the meaning of WIN-WIN principle- it is
the attitude of seeking mutual benefit．
When I was little, I used to play Chinese checkers（跳棋）which include two basic tactics（战术）
: 2 The other is to block the passages of your rival. Players may apply these two totally different
approaches in the game, but the key for the player to win is to continuously create paths for him even
if his opponent may take advantage of it. 3 Meanwhile, some player may take another approach to
prevent his opponent from moving forward at all costs. By this he may get a short-term benefit, but
couldn’t fix attention on the final goal, thus he would never truly develop further．
4 Its core is to achieve your objective while giving other people some benefits, so there is no real
loser. One example of applying the WIN-WIN principle is the voluntary system in the US. 5
It is quite usual that some people are too selfish and never take other people’s interests into
consideration, while someone who really has courage to do something for the public is often called
"foolish" or "stupid". Actually helping other people can be of great delight to the helper, for he can also
learn something crucial for his life such as sympathy, care, devotion, etc. So only if you take other
people’s interests into earnest consideration can you assure your own gain．
A. Playing Chinese checkers really needs skill.
B. In the 1990s, a strategy called WIN-WIN became widespread in the western world.
C. It was important for me after I knew its meaning.
D. One is to create paths for yourself.
E. Most Americans advocate the spirit of social service and voluntary contribution.
F. It sounded strange to me at first.
G. Finally he can always reach the destination a few steps ahead of the other player.
O2（g）═H2O（l）△H=-285.8kJ/mol．下列说法不正确的是（ ）