If you___________(不停地努力), you will be able to resolve the difficult problem soon

游客2023-07-24 37

问题 If you___________(不停地努力), you will be able to resolve the difficult problem sooner or later.

选项

答案 keep on trying

解析本题考查keep on doing sth．的用法，keep on doing sth．意为“持续不断地做某事”。

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