..., A BAT SENDS OUT A SERIES OF SIGNALS, WHICH BOUNCE OFF ANY OBJE...
3. ..., a bat sends out a series of signals, which bounce off any object in its path.
A. When in flying
B. While it is flying C.When they are flying D. Once flying
3. ..., a bat sends out a series of signals, which bounce off any object in its path.
A. When in flying
B. While it is flying C.When they are flying D. Once flying