The color of red (symbolizes) happiness.
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Many children can't (function) effectively in large classes.
A. 功能
B. 鼓励
C. 起作用
D. 劝说
They hold a wedding (celebration) in the house that night.
A. 事业
B. 庆祝
C. 原因
D. 轨迹
WTO (stands for)world trade organization.
A. 站立
B. 排队
C. 代表
D. 走动
I won't feel ( at ease) until you come back safely.
A. 独来独往
B. 自由自在
C. 独一无二
D. 简简单单