单选题 ______ is the center of our planetary system was considered as heresy by the church in the Middle Ages.
  • A. It is the sun and not the earth
  • B. That the sun and not the earth
  • C. Being the sun and not the earth
  • D. The sun and not the earth


【正确答案】 B
【答案解析】[考点] 考查主语从句。
that在此引导主语从句，全句的谓语是was considered，故选B。