Having checked the doors were closed,and_______all the lights were off,the boy opened the door to his bedroom.

I had to take a taxi home yesterday because my car broke down.— You ____. I was not using it.[ ]

While we are very interested in Realcine,we will still need much more information we can make a decision to use it.

t my glasses, I couldn’t _____ whether thatfigure on the blackboard was a three or an eight

n have conversation with John over_____ phone, but keep in touch with Tom by writing _____ letters.