With the improvement of people’s living conditions most mothers in hospitals. A. have de

问题补充：

With the improvement of people’s living conditions, most mothers in hospitals.

A. have delivered their babies

B. have born their babies

C. have their babies born

D. have their babies delivered

答案：

A. have delivered their babies

B. have born their babies

C. have their babies born

(答案→)D. have their babies delivered

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