(A) The Homestead Act of 1862 granted 160 acres of land (B) for any settler who (C) would spend five years (D) on the land.

It isn't cold outside. You.......wear a coat.

As soon as I........my report, I'll call you and we'll go to dinner.

Nam (A) asked Mai what (B) can he do (C) to help (D) her.

The primary causes of species extinction are........destruction, commercial exploitation and pollution.

My impression of him was that he was a very capable person.

Credit cards.....in international trade are very convenient.

You're the worst guitarist in the world.

The 22nd SEA Games consisted of athletes from eleven.....countries.

Laura is telling Bob about her exam results.

~Laura: "..............."

~Bob: "That's great. Congratulations!"

What is the main topic of this passage?

Polluted water and increased water temperatures have driven many species to the verge of extinction.

It can be inferred from paragraph 1 that in the 19th century,..........

Humans depend on species diversity to have food, clean air and water and fertile soil.......agriculture.