--- Were they late for the play? --- Not really. As soon as they ____ themselves in their seats in the theater, the curtain ____.
Many experts believe that teachers’ development is _____ the key to better education lies.
Evidence has been piled up_____drinking water after getting up in the morning contributes to one’s health.
There is a great deal of research ___that music activities engage different parts of the brain.
Teenagers have reached a point in their life_____they are supposed to make decisions of their own for the first time.
They are considering ____ the house before the prices go up.