一篇作文要得高分，必须要有主题句。简言之，主题句就是用以概括文章中心思想和核心内容的句子，可以最直接、凝练地体现作者的写作意图，表达感情和立场。一般情况下，主题句适宜配置在两个位置：一段的段末，或第二段的段首。 如果你在写作时，除了Three reasons can be related to the charts above. 或者I have three comments to the charts above.就无话可说了，说明你需要继续修炼写作基本功。千万不要忽略精彩的主题句对于表达中心思想的重要性。虚的多、实的少，当然不会得高分。 请看以下“救急词组”，大家一定要背熟，达到发现主题词后就能迅速填空的程度。

救急词组1)not only important, but also indispensable 不仅重要，而且不可或缺 例句：Mutual support is not only important, but also indispensable in modern society. 译文：互相帮助在当代社会不仅很重要，而且是不可或缺的。 替换表达：... play a key role in... serve a leading/dominant role in...

救急词组2)Special attention must be paid to... 必须特别注意…… 例句：Special attention must be paid to the importance of environmental protection. 译文：必须特别注意保护环境的重要性。 替换表达：Careful attention must be directed to...

救急词组3)... threaten to do more harm than good to... ……对……弊大于利 例句：Overfishing threatens to do more harm than good to the marine environment. 译文：过度捕捞对海洋环境弊大于利。 替换表达：... have a negative/serious impact on... ... exert a negative/positive effect on... The side-effects of... outweigh its so-called benefits.

救急词组4)... benefit treme dously from... 从……中大大获益 例句：Many consumers benefit tremendously from on-line shopping, along with the popularity of the Internet. 译文：随着互联网的普及，很多消费者从网购中大大获益。 替换表达：... is beneficial to...

救急词组5)... solve many practical problems for... 为……解决了很多实际问题 例句：The Internet solves many practical problems for netizens. 译文：互联网为网民解决了很多实际问题。替换表达：... tackle many problems for...

救急词组6)... have a responsibility to... 有……的责任 例句：Sons and daughters have a responsibility to take care of their aged parents. 译文：子女有照顾年迈父母的责任。 替换表达：... perform/shoulder the responsibility of doing... ... should not deny the responsibility of doing...

救急词组7)... must be widely advocated. 必须广泛倡导…… 例句：Cultural exchanges must be widely advocated at different levels. 译文：必须广泛倡导不同层面的文化交流。 替换表达：... must be strongly advocated