________, A BAT SENDS OUT A SERIES OF SIGNALS, WHICH BOUNCE OFF ANY...
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