These pills should (keep) ______ out of the reach of children. be kept情态动词。情态动词被

游客2024-08-01  12

问题 These pills should (keep) ______ out of the reach of children.

选项

答案 be kept

解析 情态动词。情态动词被动式。情态动词被动语态形式是:情态动词+be+动词的过去分词。
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