题目内容
______on ten years of observation and study, Professor Wang announces that everyone dreams every night, whether they realize it or not.
A. Basing B. Based C. Been based D. Having based
【答案】
B
【解析】
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______on ten years of observation and study, Professor Wang announces that everyone dreams every night, whether they realize it or not.
| A．Basing | B．Based | C．Been based | D．Having based |