单词拼写（每空1分，共5分）

小题1:Your bad behavior really makes me feel         (尴尬的).

小题2:.He       (承认) that Gangnam Style was his favourite song.

小题3:        (电) is a form of energy that can be used for lighting.

小题4:WTO which stands for World Trade         (组织)deals with the global rules of trade between nations.

小题5:Many people believe that Guo jingjing is f       (幸运的，吉祥的)to marry Huo qigang.

对于5年可成材的树木，从栽种到5年成材的木材年生长率为18%，以后木材的年生长率为10%．树木成材后，既可以出售树木，重栽新树苗；也可以让其继续生长．问：哪一种方案可获得较大的木材量？（注：只需考虑10年的情形）（参考数据：lg2=0.3010，lg1.1=0.0414）