He had a（）look in his eyes. He must have been shocked.
A. empty
B. bare
C. blank
D. hollow
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大脑皮层成熟的程序是（）。
A. 额叶→枕叶→颞叶→顶叶
B. 顶叶→额叶→枕叶→颞叶
C. 枕叶→颞叶→顶叶→额叶
D. 额叶→顶叶→颞叶→枕叶
Many people save money to（）for their old age.
A. supply
B. offer
C. provide
D. yield
鲍比尔、埃斯沃斯等将婴儿依恋发展的阶段划分为（）。
A. 前依恋期、依恋建立期、依恋关系明确期、目的协调的伙伴关系期
B. 非社会性阶段、未分化的依恋阶段、分化的依恋阶段、多重依恋阶段
C. 无差别的社会反应阶段、有差别的社会反应阶段、特殊情感联结阶段
D. 依恋萌芽阶段、依恋分化阶段、依恋确立阶段
The water was so（）that we could see the fish inside clearly.
A. transparent
B. obvious
C. apparent
D. visible
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