A number of theories have been proposed to explain the situation.A:suggested ...

作者: rantiku 人气: - 评论: 0
问题 A number of theories have been proposed to explain the situation.
选项 A:suggested B:tested C:used D:announced
答案 A
解析 本句意思:很多理论被建议去解释那种情况。propose意为“建议”,与suggest(建议)意 思相同。test测验;use使用;announce宣布。
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