Optimism is the art of always seeing the glass half full (1) half empty, finding something positive in even the most (2) of situations and last but not least the ability to expect the best even if the chances are (3) . It enables you to try new things, deal with failure as a learning experience (4) a stopping point. In general optimism gives you a reason to live. The world would be a better place if it was full of optimism, (5) unfortunately the trend in today’s youth is (6) the opposite way. Today it is (7) to be pessimistic. One could spend hours discussing how we arrived at this point, (8) our youth refuses to smell the roses and instead prefers to (9) themselves on their own pessimistic (10) .
Optimism is not an (11) gift but rather a learned behavior (12) . Like most behaviors optimism is best learned by watching examples, (13) you. The first step in creating a generation of people with a positive outlook on life, is to (14) life on the bright side yourself. (15) it would be wrong to (16) your child from all negativity, it is important that you are not the (17) of doubts and worries. Finding something positive in a negative situation needs to be (18) Show how to make the best of things by always (19) the positive, by encouraging your child after a(n) (20) and by explaining over and over that failure is just a part of progress.
5（）
A.however
B.though
C.whereas
D.but
参考答案：D
解析：
本题考查句际问语意关系衔接。阅读题句尤其是后半句中… “______unfortunately…the opposite way”，考生可以看出该句前后的逻辑关系应该是转折，即“如果世界充满了乐观，那它将更加美好。______遗憾的是，当今青年人往往与此相反”，而且从语法上看空白处需要连接词，[A]however表示转折，但不是连词；[B]though是连词，但表示让步；[C]whereas也是连词，但表示对比，所以，[D]but无论从语意还是语法上看都符合题句要求，因此是答案。