We can give you a lift to the airport _______ you don’t mind the crowdedness, for there have already been four of us in the car.
Though ______, many laws of nature exist.
The servant did _____ she could ______ the revolutionary.
The missing boys were last seen _____ near the river.
He gave me the phone number in order ______ contact him when we are in need of help.
You know that widely reading helps ______ your knowledge so I can’t help _____ the housework every day.