It has been accepted that all the students ____ put on masks before going to school in case they are infected with flu virus.

A. shall B. will

C. need D. may

 

A

【解析】

試題分析: 考查情態(tài)動詞。句意:學生們應在去學校之前帶上口罩以防感染禽流感,這已經(jīng)被廣泛的接受。Shall用于第二、第三人稱,表示說話人給對方命令、警告、允諾或威脅,故選A項。

考點 : 考查情態(tài)動詞

 

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