______ to reach them on the phone, we sent an email instead.
The young lady stopped and looked around as if_____ whether she was being followed. A seeing B to have seen C having seen D to see
--- Remember, Dad, Thomas Edison got bad grades in school, too. --- Stay in your room until you’ve _____ the electric lamp.A invented B discovered C made D imagined
There isn’t much time_____ . shall we go now? A leaving B to leave C being left D left
____ he came back home that we knew what had happened .
It was the training _____ he had as a young man _____ made him such a good engineer.