政府投资性支出主要有（）
A.基础产业投资
B.农业投资
C.住宅投资
D.社会非生产性投资
参考答案：A, B, D
4. Mr. Smith ______ that he had made a mistake and that he had corrected it.
A．accepted
B．admitted
C．talked
D．Promised
