建设工程投资构成中的“积极投资”是指（）。
A．软件工程投资
B．引进技术投资
C．工程建设其他投资
D．设备工器具投资
参考答案：D
— You speak very good French!
— Thanks. I _____ French in Sichuan University for four years. [ ]
A. studied
B. study
C. was studying
D. had studied
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