目录

  • 1 Week1
    • 1.1 Unit1 iPrepare&iViewing
    • 1.2 Unit1 Preview New Words and Text
    • 1.3 Unit1 iExplore1
      • 1.3.1 Text Understanding
      • 1.3.2 Language Points
    • 1.4 Unit1 Sharpening your skills
  • 2 Week2
    • 2.1 Unit1 iExplore1
    • 2.2 Unit1 iExplore2
  • 3 Week3
    • 3.1 Unit1 iExplore2
    • 3.2 Unit2 iExplore1
  • 4 Week4
    • 4.1 Unit2 iExplore1
    • 4.2 Unit2 iExplore1
  • 5 Week5
    • 5.1 Unit2 iExplore2
    • 5.2 Unit2 iExplore2
  • 6 Week6
    • 6.1 Unit3 iExplore1
    • 6.2 Unit3 iExplore1
  • 7 Week7
    • 7.1 Unit3 iExplore1
    • 7.2 Unit3 iExplore2
  • 8 Week8
    • 8.1 Unit3 iExplore2
    • 8.2 Unit4 iExplore1
  • 9 Week9
    • 9.1 Unit4 iExplore1
    • 9.2 Unit4 iExplore1
  • 10 Week10
    • 10.1 Unit4 iExplore2
    • 10.2 Unit4 iExplore2
  • 11 Week11
    • 11.1 Unit4 iExplore2
    • 11.2 Unit4 iExplore2
  • 12 Week12
    • 12.1 Unit5 iExplore1
    • 12.2 Unit5 iExplore1
  • 13 Week13
    • 13.1 Unit5 iExplore1
    • 13.2 Unit5 iExplore2
  • 14 Week14
    • 14.1 Unit5 iExplore2
    • 14.2 Unit7 iExplore1
  • 15 Week15
    • 15.1 Unit7 iExplore1
    • 15.2 Unit7 iExplore1
  • 16 week16
    • 16.1 Unit7 iExplore2
    • 16.2 Unit7 iExplore2
  • 17 Week17
    • 17.1 Unit7 iExplore2
    • 17.2 Listening Practice
Unit1 iExplore1

identify the topic sentence 

    The topic sentence tells readers the mainidea of a paragraph in simple and direct terms. It may include two elements:the topic, which is the subject of the paragraph, and a perspective on the topic, which is a statement about the topic.

      It is usually at the beginning or the end of a paragraph, but its position may vary.


When Feeding Birds, Think Safety and Health

Words in This Story

feeder – n. a device for supplying food to animals

species – n. a group of animals or plants that are similar and can produce young animals or plants

moldy – adj. covered with a soft substance that grows on the surface of damp or rotting things

bleach – n. a strong chemical that is used to make something clean or white

diversity – n. the quality or state of having many different forms, types, ideas or other things

choke – v. to become unable to breathe because something gets stuck in your throat

birdbath – n. a bowl that is filled with water and usually raised above the ground in a yard or garden so birds can bathe in it