1. D
2. B
3. A (But if you have great passion, cycling in London can be exciting, and it is an inexpensive way of keeping fit if you live there. )
4. A (There are not enough lanes especially for bikes, and making your way through the traffic can be very risky.)
5. A (Wearing a cycling helmet is not compulsory in Britain, but it is a good idea to wear one for protection.)
