The scientists predict that if present trends____, women in 400 years will be 2cm shorter and have healthier hearts.
The girl can ride a horse and swim,and she can shoot________.
The door opened and in________.
You can take anything from the shelf and read,but please ________ the books when you've finished with them.
—You've made great progress in your studies of English,haven't you? —Yes,but much________.
Tom tried to escape from the burning building.________,he was hit by a piece of burning wood and was killed.