Remember, at any given moment, you are in __________ with one per-son and one person only-yourself.
. He is clever and has a____________for learning language.
The storm is moving slowly____________.
. He made up his mind to devote his life____________the river____________polluted.
. Many people think that it is ____________making such an experiment.
. One day I ____________a newspaper article about one in six European mammal species threatened with extinction.