I wonder why Ann didn't get ____ the job. She is the right person for it. [ ]

A. to be offered

B. to offer

C. offering

D. offered

教师组织幼儿在比较长的时间内，连续地对某一物体或现象的发展变化过程进行系统的观察是指（）。

A.对个别物体的观察

B.随意性观察

C.比较性观察

D.长期系统性观察