Students should (strong) ______ their sense of self-confidence.

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问题 Students should (strong) ______ their sense of self-confidence.

选项

答案strengthen

解析分析句子结构，本句缺少谓语动词。而本句中情态动词should后也应加动词原形，所以将strong变为名词strength，然后在后面加-en后缀构成动词。

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大学英语三级B级

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