6Pleased with his students’ progress, Professor Tyler praised them _____________

游客2023-07-22  31

问题 6Pleased with his students’ progress, Professor Tyler praised them _____________(不止一次).

选项

答案 on more than one occasion

解析 名词“occasion”与介词“on”搭配使用。本题如果使用“once”,则不需加介词。
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