答案　C　[通读全文可知我以父亲为荣。be proud of对……感到自豪，符合语境。]

　　20．A.resulted

　　B．differed

　　C．suffered

　　D．dated

　　答案　A　[句意：谁会否认我的成功源于一位极其坚强的人(父亲)的决心和坚持？result from因……产生，由……造成，符合语境。]

　　Ⅴ.阅读理解

　　All you moths out there，listen carefully.A scientist named Holger Goerlitz has some bad news.You probably already know that bats want to eat you. But Goerlitz and his colleagues have found that the Western barbastelle bat of Europe whispers so quietly that you'll never hear it coming.So look out，and good luck.

　　Perhaps there's nothing scarier to a moth than a quiet bat.　

　　Bats are basically blind. Since they can't rely on their eyes to hunt for food，these flying mammals use sounds. Bats let out a highpitched noise in the night，and the sounds wave bounce off nearby objects—such as delicious moths. Bats hear this echo，judge where it comes from，and then move in for the kill. This technique is called echolocation.

　　The problem with most bats is that they're loud. Studies have found that when some bats make their echolocation sounds in the night，they're louder than rock concerts and sometimes as loud as jet engines. As a result，some moths can hear some of these sounds from nearly 100 feet away—plenty of warning. These sounds are “high notes”—so high that human beings，with our limited ears，cannot hear them. “That's quite lucky for us，” Goerlitz said.

【2017届高考英语（重庆专用）二轮精练：必修4 unit4 period 2】相关文章：

★ 2017届高考英语（重庆专用）二轮精练：必修5 unit4 period 1

★ 2017届高考英语（重庆专用）二轮精练：必修3 unit4 period 2

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修2 unit4《Wildlife protection》

★ 2017届高考英语二轮复习课时训练：7（含解析）

★ 2014高考英语（新人教版）一轮基础训练（20）A、B卷（附答案或解析）

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修1 Unit 1《School life》单元检测（含解析）

★ 2017届高考英语二轮复习课时训练：18（含解析）

★ 2017届高考英语（重庆专用）二轮精练：必修2 unit4 period 1

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修4 Unit 1《Advertising》

★ 2017届高考英语（重庆专用）二轮精练：必修5 unit4 period 2