编辑：sx_chenj
2014-05-19
英语高中改错题练习How robins(知更鸟) know when it is time 56._____
to go back north? They seem to tell by how
soon daylight lasts. In late winter， daylight 57. _____
begins to last longest each day. When the 58. _____
daylight lasts long enough， robins start north. 59. _____
They fly by day. Each year they follow a same 60. _____
fly-way. At first， they fly only few miles a 61. _____
day. They stop often in the field to eat bugs 62. _____
(小虫子). Late， they seem in a hurry. They fly 63. _____
over 100 miles a day. Some are going so far 64._____
as 180 miles. When they get to home， they 65. _____
always stay together high in a tree.
英语高中改错题
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