2. 职称英语
  3. How robins(知更鸟)know when it is time 76______to go back north? They seem to tell

How robins(知更鸟)know when it is time 76______to go back north? They seem to tell

游客2025-07-24  3
问题 How robins(知更鸟)know when it is time 76______
to go back north? They seem to tell by how
soon daylight lasts. In late winter, daylight 77______
begins to last longest each day. When the 78______
light lasts long enough, robins start the north. 79______
They fly day by day. Each year they follow a same 80______
flyway. At first, they fly only few miles a 81______
day. They stop often in the field to eat bugs(小虫子). 82______
Late, they seem in a hurry. They fly 83______
over 100 miles a day. Some are going so far 84______
as 180 miles. When they get to home, they 85______
always stay together high in a tree. [br]
选项
答案 去掉to
解析 “在家”at home，“到(回)家”为get(go)home。
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