1、UNIT 2 Verb Forms.7UNIT 3 Modals.10UNIT 4 Conditional Sentences.13UNIT 5 Passive Voice.16UNIT 6 Relative, Adverbial, and Noun Clauses19UNIT 7 Sentence Structure.24UNIT 8 Word Order.26UNIT 9 Connecting Words.29SECTION 2UNIT 10 Subject-Verb Agreement.32UNIT 11 Articles.34UNIT 12 Singular and Plural of
2、 Nouns.36UNIT 13 Word Choice.38UNIT 14 Word Forms.40UNIT 15 Prepositions.44SECTION 3PART A Expand Your Vocabulary.48PART B Achieve an Academic Writing Style. 48PART C Avoid Nonidiomatic and Unclear Sentences48PART D Improve Flow of Ideas.50PART E Revise Your Writing.50APPENDIX CExercise 1.51Exercise
3、 2.51Exercise 3.52Exercise 4.53Exercise 5.53Exercise 6.54Answer KeyUnit 1Pre-test: What Do You Already Know?See page 350 of Writing Clearly, Third Edition for answers to the Pre-test.Practice What You Have Learned (pages 2125)Exercise 1 (page 21)I 1. I have been interested in physics since high scho
4、ol.I 2. Having good social skills is essential for my job, and I decided (OR have decided) to take a class in personal communication.I 3. Since she was a child, she has liked sports, especially water sports, such as swimming and waterskiing.I 4. Mario graduated as a veterinarian in January of last y
5、ear.C 5. CorrectI 6. First, we went to Italy. Then, we traveled to Austria and Germany. Finally, we visited Spain.I 7. The professor gave an introduction to the course yesterday, the first day of class.I 8. There are rumors that college tuition will be (OR is going to be) higher next year.C 9. Corre
6、ctI 10. In my opinion, voting in elections is very important.Exercise 2 (page 22) 1. helps 2. is 3. have learned OR am learning OR have been learning 4. plans 5. goes 6. writes 7. has OR will have OR is going to have 8. will spend OR is going to spend 9. schedules 10. sets 11. is 12. disciplines 13.
7、 has completed OR completes 14. invited OR had invited 15. refused 16. had not finished 17. know 18. will make OR am going to makeExercise 3 (page 23) 1. read 2. am writing 3. have heard 4. graduated 5. fulfilled 6. am working 7. will complete OR am completing OR will have completed 8. am looking fo
8、r OR have been looking for 9. will need OR will be needing OR am going to need 10. have visited 11. find 12. enclose OR am enclosing OR have enclosedExercise 4 (page 24)Option A I have a positive attitude toward writing in English. When I first came to the United States, I was very confused about us
9、ing English, a new and strange language. But as time went by, my feeling toward the language began to change. I forced myself to write even though it was hard at first. I wrote a lot, and I became more confident each time I wrote. Now, although I am more confident about writing, I still have many pr
10、oblems to overcome. I find that writing takes a great deal of time, and one has to be patient and disciplined in order to be good at it. At times, I am (OR have been) frustrated and impatient with my writing. In fact, sometimes I sit for hours and cannot write even a word. Nevertheless, despite my f
11、rustration and long hours of work, I tend to have a positive attitude toward writing in English. Even though English is not my native language, I have found that I simply like to write.Option B I have a positive attitude toward writing in English. When I first came to the United States, I was very c
12、onfused about using English, a new and strange language. But as time has gone by, my feeling toward the language has begun to change. I have forced OR force myself to write even though it was hard at first. I have written (OR write) a lot, and I have become (OR become OR am becoming) more confident
13、each time I write. (The rest of the paragraph remains the same as Option A.)Exercise 5 (page 24) Children of immigrants who do not speak English often function more like adults than children. As a child of immigrant parents myself, I have often had to act as an adult. Ever since my family arrived here five years ago, I have taken (OR have been taking) care of them in many ways. I have had to pay the rent, th
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