The professor warned the students that on no account________use mobile phones in his class．（） --优优班--学霸训练营

The professor warned the students that on no account________use mobile phones in his class．（）

A．should they

B．they should

C．dare they

D．they dare

【考点】部分倒装,should的用法

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【解答】请登陆后查看

难度：较难

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