Реши задание на изображении

Answers:
1 — a
2 — b
3 — a
4 — b

Why:

1. To avoid pickpockets, you should look after your wallet.
2. How about + verb-ing? is used to make a suggestion. A suitable response is: I didn’t think of that.
3. To protect your home, you can fit an alarm system.
4. Before leaving the house, you should lock all the doors.

Check: each answer matches the meaning of the question and forms a logical dialogue.