答案:【计分规则】: 切合题意,表达清楚,语言准确,无语法及单词错误,表达出关键点即可赋分。若出现语法或时态错误,扣1分,拼写错误2处及以上扣1分。第一档(4-5分) 表达清晰完整,切中要点,逻辑连贯,运用较多的语法结构和词汇,使用了复合句,基本没有语法和词汇错误。第二档(3-4分) 表达清晰完整,使用的语法结构和词汇较为基础,基本没有语法和词汇错误。第三档(1-2分) 基本完成了题目规定内容,语法结构简单,词汇有限,有3处以上语法和词汇错误。第四档(0分) 未能按要求完成作业,或所写内容与题目要求无关,或有5处以上语法和词汇错误。Suggested Answer: We have various devices for binding sentences into a text, including logical connectors, grammatical connectors and lexical connectors. Logical connectors refer to the transitional words or expressions that indicate the logical sequence between clauses or sentences. Grammatical connectors usually include some tense-aspect collocations, pronoun reference and comparative reference, substitution and ellipsis, as well as the use of parallel constructions. By lexical connectors, we mean the repetition of key words, and the use of synonyms, near-synonyms and antonyms as cohesive ties.