It's suggested that some activities ________ to celebrate the 30th anniversary of the Reform and Opening up.

A．should hold

B．are held

C．be held

D．will be held

以下属于X理论对人的本性所做的假设的是（）。

A.人并非生来就是懒惰的

B.人生来就以自我为中心

C.人追求满足欲望的需要

D.大多数人都具有解决组织问题的丰富想像力和创造力