Tham khảo tài liệu 'gmat official guide for toefl 11th edition part 5', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The Official Guide for GMAT Review 11th Edition 18. Computers are becoming faster more powerful and more reliable and so too are modems they are the devices to allow two or more computers to share information over regular telephone lines. A so too are modems they are the devices to allow B so too are modems the devices that allow C so too modems the devices allowing D also modems they are the devices that allow E also modems which are the devices to allow Grammatical construction Rhetorical construction The structure of the first main clause and the comma following reliable lead the reader to expect a second main clause. The clause so too are modems correctly fulfills this expectation. However the clause introduced by they are is another main clause and its inclusion creates a run-on sentence. To allow is not an idiomatic way to modify devices either that allow or allowing would be correct. A They are creates a run-on sentence to allow is not an appropriate way to modify the devices B Correct. This sentence provides a correct main clause that allow is an appropriate way to modify the devices C Verb are is necessary to make this a main clause D Use of also is awkward ungrammatical and confusing the reader is initially led to think that computers are also becoming modems but this is clearly not the intended meaning of the sentence E Also should again be replaced by a clause to allow does not correctly modify devices 20. The correct answer is B. 19. In virtually all types of tissue in every animal species dioxin induces the production of enzymes that are the organism s trying to metabolize or render harmless the chemical that is irritating it. A trying to metabolize or render harmless the chemical that is irritating it B trying that it metabolize or render harmless the chemical irritant C attempt to try to metabolize or render harmless such a chemical irritant D attempt to try and metabolize or render harmless the chemical irritating it E attempt to metabolize or .
