We have phoned her several times, but unfortunately she is still out of        .

We should do all we can        the children who lost the chance to go to school.

---- You can take a walk daily if you want to keep healthy.

----        .

      our earth, or else it will be no longer fit for us to live on.

Professor Williams keeps telling his students that the future       to the well- educated.

Trees on the hills can stop the rains from        away the soil.

What is the best way you can imagine        the overuse of water in our daily life.

The boy        be very naughty, but he is very lovely.

The good thing about children is that they        very easily to the new environments.

---- Let’s go to        cinema.

---- That’ll take your mind off the problem for        while.