2. 职称英语
  3. In the month of September, in Britain, you may see large numbers of birds【C1

In the month of September, in Britain, you may see large numbers of birds【C1

游客2023-07-19  56
问题     In the month of September, in Britain, you may see large numbers of birds【C1】______ on roofs and telegraph wires. These birds are swallows. They are【C2】______. together because, very soon, they will be flying【C3】______ to much warmer lands, where they will find【C4】______the small flying insects on which they【C5】______. There are no such insects【C6】______in Britain during the winter; it is【C7】______cold for them.
    The swallows settle, fly off, swoop, and【C8】______again.  This they do many times, for they are making short【C9】______ flights in order to be fit for the long journey【C10】______them.
   【C11】______of these migrating birds leave Britain in the autumn. They fly【C12】______for hundreds of miles【C13】______they reach the warm lands of Africa. But not all the birds get there, for many of them perish in the stormy weather they meet with【C14】______.
    In the spring of the following year they【C15】______the long and tiring journey back to Britain. They return to the identical barn or tree in the【C16】______district which they had left the【C17】______autumn. How do these birds find their【C18】______there and back over such vast distances? Nobody knows exactly【C19】______, but it has something to do【C20】______ winds and air currents. [br] 【C13】
选项 A、until
B、before
C、when
D、as
答案 A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2849272.html
相关试题推荐
随机试题
最新回复(0)