We were a very motley (混杂的) crowd of people who took the bus every day many years ago. During the early morning ride from the suburb, we sat drowsily (昏昏欲睡地) with our collars up to our ears.
A small grey man took the bus to the center for senior citizens every morning. No one ever paid very much attention to him. Then one July morning he said good morning to the driver before he sat down. The driver nodded guardedly. The rest of us were silent.
The next day, the old man boarded the bus energetically, smiled and said in a loud voice: "And a very good morning to you all!" Some of us looked up, amazed, and murmured "Good morning!" in reply.
The following weeks we were more surprised. Our friend was now dressed in a nice old suit and a wide out-of-date tie. He said good morning to us every day and we gradually began to nod and talk to each other.
One morning he had a bunch of wild flowers in his hand. The driver turned around smilingly and asked: "Have you got yourself a girlfriend, Charlie?" The man nodded shyly and said yes. Every morning after that Charlie always brought a flower.
The summer went by when one morning Charlie wasn't waiting at his usual stop. When he wasn't there the new day and the day after that, we started wondering if he was sick or – hopefully – on holiday somewhere, Later we were told one of his very close friends had died at the weekend. How silent we were the rest of the way to work. The next Monday Charlie was waiting at the stop, a little bit more grey. Inside the bus was a silence similar to that in a church. Even though no one had talked about it, all those of us sat with our eyes filled with tears and a bunch of wild flowers in our hands.
From the first paragraph we can inter that the passengers ____.

A．had a cheerful trip every morning	B．didn't know each other
C．seldom talked to each other	D．talked and laughed on the way

Why were some of the passengers amazed when the old man greeted them?

A．Because he looked energetic.	B．Because he spoke in a loud voice.
C．Because he was holding some flowers.	D．Because they hardly greeted each other.

How did the passengers feel when Charlie was not there the next day?

A．Concerned.

B．Pleased.

C．Surprised.

D．Disappointed.

The underlined word "it" in the last paragraph most probably refers to ____.

A．the reach for his not taking the bus	B．the death of one of his very close friends
C．the reach for his looking more grey	D．the silence on the bus