单选题 The results from a survey ______ that studying this book twice raises one's TOEIC score by almost 30%.
A. refer
B. inquire
C. assure
D. indicate

【正确答案】 D
【答案解析】高级问题 当要以that引导的从句来表示研究、调查、新闻报道等的内容时,经常使用的动词有show,indicate,say,reveal,summarize,state,imply等。其余选项中词语的用法也请务必掌握。
[高频词语] refer to 参考 inquire (of sb.) +名词性从句 询问 assure sb. of / that 使确信,使放心