It’s high time we _____ strict measures to stop pollution.

（ ） some mammals came to live in the sea is now known.

It is important that the boy （ ） an adult to take care of him.

William suggested _____ a party for Elizabeth who was going to retire soon.

Fast food doesn’t seem like a good idea, for it is （ ）.

At the 60th anniversary, the guests sitting in the front are those ______ graduates from the university.

The hotel couldn’t offer （ ） for all four of us.

To save energy, people have to （ ） their electricity consumption.

It was only by a great effort of will and courage that he was able to （ ） himself together.

In the swamp the army （ ） by mosquitoes.

She didn’t want to go to Africa: probably （ ） the weather is too hot.

The most important is not_____ you do, but_____ you do it.