1. by leaps and bounds - d very quickly.

2. do away with - h put an end to.

3. embrance - completely accept.

4. hologram - g a three-demensional image.

5. mainstream - b considered nromal and used by most people.

6. drone - e an aircraft without a pilot, controlled from the ground.

7. start-up - c a company that is just beginning to oparate.

8. prototype - f the fisrt model of sth new.

1 - d                                2 - h

3 - a                                 4 - g

5 - b                                6 - e 

7 - c                                 8 - f