外研版（2019）必修1《Unit 5 Into the wild》2021年同步练习卷（课文阅读理解）

Ⅰ.After reading the passage，please fill in the following blanks.

• 1．Every autumn millions of monarch butterflies begin（1）

  long and difficult journey.They manage（2）

  （travel） around 4，000 kilometres south to places （3）

  they will spend the winter.A team of scientists（4）

  （lead） by Professor Eli Shlizerman has found out the solution（5）

  the mystery of the monarch's amazing ability.In the last few years，the number of monarch butterflies（6）

  （crash） by ninety percent.Human activity is the main reason.People are destroying the natural environment by （7）

  （cut） down trees and using chemicals that kill the plants that monarch caterpillars eat.So a better（8）

  （understand） of the monarch's behaviour has led to a greater（9）

  （aware） of this creature.People have been working to make sure that there are enough plants for them to feed on.The more we know about these delicate creatures，the （10）

  （great） the chance they will survive.
  组卷：44引用：4难度：0.9

  解析

Ⅱ.句式分析

• 4．If this works，there may come a time when the number of monarch butterflies increases once again.（句式分析）
  组卷：3引用：2难度：0.7

  解析

• 5．The more we know about this lovely creature，the greater the chance it will survive and keep its place in the natural world for a long time to come.（句式分析）
  组卷：0引用：1难度：0.7

  解析