Complete the highlighted phrases with the correct preposition or particle.
1. It's perfect..........a businessman or businesswoman.
2. It's very convenient............people who want a meal quickly.
3. It comes.......handy.......people going on a picnic.
4. It would be ideal..................a special birthday gift for a friend.
5. It's useful......students who have to do a lot of coursework in different places.
6. It's designed......................make life easier for people who lead busy lives.
7. It's just what you need........help you to learn English.