1. Traveling abroad would expose the kid to different kinds of language and cultures. 2. His body's weak but it's unrelated to his unhealthy life style. 3. It has never occured to me to express my thankfulness. 4. He left the office an hour ago but haven't got home yet; there's a chance that he might be caught in the traffic. 5. The new regulation will force the company to adopt the energy-conserving measures.