Eating too much fat can __________ to heart disease and high blood pressure.
---John and Tom, you two clean the classroom today, _____? ---But we cleaned it yesterday.
Pleasant as they made it ______ in Jiuzhaogou, we felt tired after the long journey.
Although the police thought he was the most likely one, _____ they had no exact proof about it, they could not arrest him.
As we know, _____ medical examination will help us find out health problems as early as possible.
I found some old pictures at the back of my drawer which _____ memories of my childhood.