Our school, in 1943, will celebrate its 70th anniversary this year.
A. founded
B. founding
C. to be founded
D. was founded
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(答案→)A. founded
B. founding
C. to be founded
D. was founded
解析：试题分析：句义：我们学校，成立与1943年，今年将举行70周年纪念。首选判定所填内容是非谓语，D是谓语动词结构，所以D不对。School 和 found之间是被动关系且已经完成，A表被动且完成，而B表主动关系，C表被动但表将来，所以A正确。