_Stressful environments lead to unhealthy behaviors such as poor eating habits,which_______increase the risk of heart disease.
Once telling him the truth, _____.
Willpower is a kind of quality, _____ is _____ it takes to do anything well.
Tom is keen _____ surfing the Internet in his spare time.
The students were completely _____ in their reading.
She missed the plane, _____ driving very fast to the airport.