5. The___________(invent)of the steam engine(蒸气机)changed the world.

4. I can find lots of_________ (information)in a few minutes on the Internet.

3. The modern printing press can make________ (thousand)of books a day.

2. There are three________(hundred)workers in the factory.

1. The machine ________(make)by Mr Green ten years ago.

7. I have to look_______ my little sister, because my mother isn’t at home.

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6. Please talk______ the questions in groups.

5. The fish can’t live_______water.

4. Many years ago, people wrote the book _____hand.

3. Please fill in the blanks _____a pencil.