According to Darwin's Survival of the Fittest, only those species that were able to ______ the sudden great changes of their living conditions survived.
The discovery was made_______, which we hadn’t expected .
Many of them turned a deaf ear to his advice, ________ they knew it to be valuable.
The government has taken some measures to reconstruct the earthquake-hit areas, but it must be some time ________ everything returns to normal.
The girl felt nervous at the stage with a lot of audience _______her.
The house ________ I grew up has been taken down and replaced by an office building.