Ответ:

A. 1. assimilated                              

2. incorporated                            

3. linked one

4. amalgamated

5. merged to

6. integrated

7. blended

8. swallowed up

9. got together

10. took over

B. 1. alliance

2. union

3. federation

4. the alloy

5. compound

6. synthesis

7. unification

8. blend

9. coalition

10. the merger