Most of the changes (occurred) in pattens of family planning (had taken place) b

游客2025-05-08  0

问题 Most of the changes (occurred) in pattens of family planning (had taken place) before public family services were established and at (considerable) emotional and physical costs (to many couples).

选项 A、occurred
B、had taken place
C、considerable
D、to many couples

答案 A

解析
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