, babies begin to talk between 12 and 15 months, but they can use body language to communicate before they begin to speak.
As you are now a member of our society we shall let you ______ our secrets.
_____ many times, she still didn't know how to do it.
_____ many times, but she still didn't know how to do it.
Scientists think that the continents today _______ always where they _______.
Scientists think that the continents _______ always where they ___today.