题干
30. The mayor of Beijing says that all construction work for the Beijing Olympics ______by the end of this month.
A：has been completed
B：has completed
C：will have completed
D：will have been completed.
答案(点此获取答案解析）
B
大会在北京举行。与以往前四届不同，今年以“维护中国统一——新疆、西藏的历史与现状”为主题。全国政协主席贾庆林在会见大会代表时指出，维护民族团结和领土完整，实现中华民族的伟大复兴，是海内外中华儿女的共同心愿。回答20—2l题。
于