单项选择题

Research in the social science focuses on problems of individuals in contexts such as family, work setting, and society （）

A. in principle
B. at large
C. in short
D. at all

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单项选择题

I stared at the canteen as if it were a mirage.()

A. I imagined seeing a canteen.
B. I looked at the canteen closely.
C. I knew there wasn't a canteen actually.
D. I couldn't believe that the canteen was still there.

单项选择题

When children approach their teens, they become more （） of their appearance.

A. conscious
B. suspicious
C. ambitious
D. conscientious