D

解析：考查冠词的用法。第一空为短语：get a +adj+idea of sth.；第二空为特指，特指双方都知道的那个Project plan。

仔细阅读下面的短文，短文中有10个空格。请根据语境或按照括号内的具体要求完成语法填空。

Soon after Dave left college, one of his uncles, who was rich and had no    21   of his own, died and left Dave a lot of money, so he decided to   22   (动词) his own real estate agency(房地产公司).

He found a nice office,    23   (buy) some new furniture and moved in. He had only been there for a few hours when he heard someone coming    24   the door of his office.

“It’s my first customer!” he thought. He quickly picked up    25   (冠词) telephone and pretended to be very busy    26   an important call from someone in New York    27   wanted to buy a big and expensive house in the country.

The man knocked at the door    28  this was going on, came in and waited   29   (polite) for the agent to finish his conversation. Then he said to him, “I’m from the telephone company, and I   30   (send) here to connect your telephone.”

With his attention________on the shops along the roadside，he knocked an old man down while riding to school.

A  concentrating     B．concentrated     C．to concentrate      D．concentrates

答案　B

解析　考查词组，故选B项。