.The petrol tank is empty.I _________it up before we left home.

Would you like to play computer games with me— Sorry, I have ________ playing them.

下列各句中，画线的“以”的用法和意义不同于其他三项的一项是（ ）

Some believe we are equipped with a special ability to learn a language and our brain adjusts itself to the language we hear around us

How did he finish the work—- I hear that he did it __________