The bridge ____ in the 1800's was the oldest building in this village.
A. to be completed B. having been completed
C. completed D. being completed
It was playing computer games that cost the boy plenty of time that he ______ spent doing his lessons.
A. might have B. should
C. ought to have D. could
Sarah hopes to become a friend of __________shares her interests.
A. anyone B. whoever
C. whomever D. who
--- Bob，are you free at the moment？I have to ask you some questions.
--- _______.
A. It's a pleasure B. Ask，please
C. Help yourself D. Yes，go ahead
He appeared __________with our team's performance.
A. satisfying B. to be satisfying
C. to satisfy D. satisfied
模拟联合国活动每年吸引着全球30多个国家的200万高中生和大学生。2011年北京大学全国中学生模拟联合大会（Peking University National Model United Nations for High School Students 2011）于2011年3月19日—22日在北京大学举行。假设你是北京大学学生会主席李华，应你的美国笔友Peter的要求，向他介绍此次大会的情况。请根据下列信息，给他写一封电子邮件。
时间、地点：2011年3月19日—22日，北京大学
参会人数：200余名学生，来自57所学校，代表97个国家
主要议题：体育发展、环境保护、妇女的权利等9个议题
活动意义：开阔视野，提高组织、沟通能力……
注意：
1. 电子邮件的开头已为你写好，但不计入总词数；
2. 词数120—150左右。
Dear Peter:
Thank you for your interest in Peking University National Model United Nations for High School Students 2011.
