According to the factory safety rules, all accidents _____ be reported to the sa
题型：不详难度：来源：
| According to the factory safety rules, all accidents _____ be reported to the safety officer. |
答案
| D |
解析
试题分析：考查情态动词。句意：根据工厂的安全法规，所有的事故都必须向安全科上报。shall用于第二三人称，表示命令、警告、威胁等语气，还可表示规定，根据rules可知，这里指的是规定，故选D。 |
举一反三
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