14. brand n.品牌，商标

     What is your favorite brand of jeans?你最喜欢什么牌子的牛仔裤？

     The company is developing a new brand of toothpaste.该公司在开发一种新品牌的牙膏。

    15. burden n.负担

     The old camel couldn’t carry the heavy burden.那头老骆驼驮不动那沉重的货物了。

     Do you find homework a burden?你觉得作业是负担吗？

    16. calculate v.计算

     Have you calculated the cost?你算花多少钱了吗？

     Scientists calculated when the spacecraft would return to the earth.科学家们推算飞船何时返回地球。

    17. candidate n.候选人

     Marie was the best candidate for the job.玛丽是干那个工作的最好的候选人。

     Was her husband one of the candidates in the election?她丈夫是参加那次大选的候选人之一吗？

    18. champion n.冠军，优胜者

     Who’s the school chess champion?谁是学校的象棋冠军？

     The French football team was the world champion in 1998.法国足球队是1998年的世界冠军

    19. concentrate v.集中

     If you don’t concentrate more on your work, you’ll be dismissed!你要是还不全神贯注做好你的工作就会被解雇！

     Can you concentrate on your studies with the music going on?放着音乐你能够把精力集中到学习上吗？

    20. conflict n.①争论，争吵

     The two political parties are now in conflict on foreign policies.两个政党现在就外交政策展开争论。

     He works with both companies and there is obviously a conflict of interest.他在两家公司任职因此很显然会有利益的矛盾。

    ②斗争，冲突

    Armed conflict could start at any time in that area.那一地区随时会发生武装冲突。

     Is there a possibility of a serious conflict between the two nations?那两国之间有可能发生严重的冲突吗？