Here are the answers based on the provided passage:

1. **What is the main idea of the passage?**
**Answer:** D. Cycling in London

2. **According to the passage, cycling in London is**
**Answer:** B. difficult

3. **The word “it” in line 3 refers to**
**Answer:** A. cycling

4. **The difficulty of cycling in London is described in lines**
**Answer:** C. 5-6

5. **According to the passage, all the following are true EXCEPT that**
**Answer:** A. It is compulsory to wear a helmet when cycling in Britain.