4. Complete the statements according to the text below.
In the past, people used different ways, even pigeons, to share information.
Pigeons could travel long distances and deliver messages quickly. They were especially popular during the World Wars, when other forms of communication were not always available or reliable. Today, we do not use pigeons for communication anymore.
Instead, we use smartphones, emails, and social media to communicate quickly and easily. We can send messages, make video calls, and share information with people all over the world in seconds.
a. Pigeons were useful to communicate in the past because --------------------------------------------------------.
b. Today, we use different types of communication such as ----------------------------, ----------------------------, and ------------------------.
c. Modern technology has made communication ------------------------------------- than in the past.