Ответ:

A.

1.  

a) set

b) set

2.

a) turn

b) turned

3.

a) looking

b) looked

4.

a) make

b) made

B.

1. it's the best decision I've ever made

2. no one make any fuss about it

3. Set up a business in another country is not an easy thing to do

4. it turned out to be a great success

5. I haven't looked back