His knowledge (spans) many different areas.
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Research (revealed) that age makes no difference.
A. 写作
B. 揭露
C. 计算
D. 解决
He was satisfied with his (earnings) as an accountant.
A. 游戏
B. 小说
C. 收入
D. 玩具
Opinion polls are an unreliable(predictor) of election outcomes.
A. 数字
B. 预测指标
C. 利率
D. 利息
Jan speaks(eloquently)about her art.
A. 仔细地
B. 详细地
C. 言辞凿凿地
D. 得意洋洋地