工程项目分为那几个阶段。（）
A.项目准备
B.项目实施
C.项目收尾
D.项目验收
参考答案：A, B, C
---Could you tell me when Mr. Li _______ in Changchun?
---Sure. When he _______, I’ll call you.
A．arrives; will arrive
B．will arrive; arrives
C．arrives; arrives
D．will arrive; will arrive
保证金账户是投资者用于证券交易资金清算的专用账户。( )
