神医废材妃连玦txt:首字母填空

Bats are the o_____ flying mammals in the world. They cannot see very well. It was long b____ and still in many places, that all bats are blind. “as blind as a bat” is often heard. Yet they have no t______ flying on the darkest night and finding their way around very well. How can bats fly and see at night? By radar.
That bat’s radar s_____ works the same as the one that ships and plants use. As a bat flies t_____ the air, he makes a sound. The sound is high enough for his ears to hear. If the sound hits a thing, it comes back. The bat’s ears receive the messages. In this way the bat is able to know where the thing is.
Bats go out to look for food at night. In the daytime they hang in some d_______ places. Some people look on bats as bad animals. In fact, they are useful.

别管有几个"_____" 填单词