I know what we're doing is legal, but ____ it doesn't feel right.

Having been told ________ where he lived, I had no difficulty in finding Peter’s address.

When asked why he prefers bikes to buses, the professor said,  “Riding a bicycle takes __________ half an hour, but it’s more convenient and environmentally friendly. ”

 Jim went to answer the phone. _________ , Harry started to prepare lunch.

Alan is a careful driver, but he drives ______ of my friends.