When I was doing shopping last Sunday, I ______ Mr. Smith in the street.
Though ____ he said was of little help to me, I thanked him all the same.
Finally, he lived up to ______ had been expected of him.
A modern city has been set up in _____ was a wasteland ten years ago.
His technique has developed to the point _____ he can help kill the latest computer virus going round the city.
The place _____ the bridge is supposed to be built should be _______ the cross-river traffic is the heaviest.