OV-8 8.As the cost of wireless service has steadily dropped over the last year and as mobile phones have become increasingly common, many people are finding that they can avoid toll charges on their home (phones, using their mobile phones for making long-distance calls at night or on weekends, at a time which) many wireless companies provide unlimited airtime for a small monthly fee (A) phones, using their mobile phones for making long-distance calls at night or on weekends, at a time which (B) phones, instead using mobile phones to make long-distance calls during the night of weekends, during which (C) phones by using their mobile phones to make long-distance calls at night or on weekends, when (D) phones using mobile phones for making long-distance calls during the night or weekends, when (E) phones when using their mobile phones to make long-distance calls at night or on weekends, a time which. OA:C PP2-23 23.Scientists believe that unlike the males of most species of moth, the male whistling moths of Nambung, Australia, call female moths to them (by the use of acoustical signals, but not olfactory ones, and they attract) their mates during the day, rather than at night. (A) by the use of acoustical signals, but not olfactory ones, and they attract (B) by the use of acoustical signals instead of using olfactory ones, and attracting (C) by using acoustical signals, not using olfactory ones, and by attracting (D) using acoustical signals, rather than olfactory ones, and attract (E) using acoustical signals, but not olfactory ones, and attracting OA:D 想請問OV-8 答案C的by using為何是正確的? 雖然用其他解題點可以找到正確答案但跟 PP2-23比較後發現不知道怎麼解這個點，懇請大家幫忙 上網找到飛騰網上是說by Ving..和 using N都可以，但是通常不會用by using N 以下附上網站連結:http://elitefg.com/phpBB3/viewtopic.php?f=23&t=197 我自己本身的理解是by Ving是採取手段達成目的，但這樣看來PP2-23的(C)by using並沒 有太大的問題，還是說我的理解哪裡有誤呢? 謝謝! --

※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 49.158.119.134 ※ 文章網址: https://webptt.com/m.aspx?n=bbs/GMAT/M.1431923116.A.BDF.html ※ 編輯: bearthomas (49.158.119.134), 05/18/2015 12:25:35