單元自測試卷八年級英語下學期人教版
注：當前書本只展示部分頁碼答案，查看完整答案請下載作業精靈APP。練習冊單元自測試卷八年級英語下學期人教版答案主要是用來給同學們做完題方便對答案用的，請勿直接抄襲。
（
B
）8. The second paragraph mainly talks about _______.
A. how fast swifts can fly
B. why swifts can fly and turn so fast
C. why swifts make sharp turns
D. how swifts turn around in the sky
答案：B
解析：第二段先講雨燕能飛多快，接著說明原因“because their wings are like boomerangs... This shape helps them to fly much faster.”以及“They can also move one wing faster than the other, which allows them to make sharp turns...”，整體是在講雨燕能快速飛行和轉彎的原因，選B。
（
A
）9. Which of the following is TRUE about swifts?
A. Swifts can't walk for a long time because of their short feet.
B. Swifts can fly for a long time because of their small bodies.
C. Swifts don't live on land because of their wings.
D. Swifts can catch nearly 1,000 bugs in one go with the saliva.
答案：A
解析：文中提到“Swifts' short feet are not good for walking or standing on land for long.”，A項正確；B項文中未提及體型小是能長時間飛行的原因；C項雨燕主要在空中生活，但不是因為翅膀而不生活在陸地上；D項“One food ball can contain nearly 1,000 bugs.”是一個食物球包含近1000只蟲子，不是一次用唾液捕捉，選A。
（
D
）10. Which of the following best shows the structure of the passage?
答案：D
二、完形填空（共10小題，計10分）
閱讀下面的短文，理解其大意，然后從各小題所給的A、B、C、D四個選項中選出一個最佳答案，使短文連貫、完整。
In autumn, it gets cold. Some birds like wild geese fly __1__ for the winter, flying in a "V" formation. __2__ do they fly in a "V" formation? Scientists find out that in this way, they can save energy. So they can fly __3__. And the trip will be safer and easier because they are travelling with the help of one another.
答案：見下頁
