What ____ pity! All the passengers on board were killed in the German air crash!—I’m really sorry to hear that. Everyone takes _____ pity on them.

He is good at English, ______we all know.

There will be ________water and ________trees in 100 years, how can we live

We need a person badly to be in charge of this design.—________ the new comer have a try?

Owning pets has a positive influence on my life and I think animals __________our protection．