21．You be careful with fire when you have a picnic in the forest．It's too dangerous．A．will B．must C．can D．may 【查看更多】

 

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You ____be careful with fire when you have a picnic in the forest. It’s too dangerous.
A．willB．mustC．canD．may

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You ________ be careful with fire when you have a picnic in the forest. It's too dangerous. (29安徽市)

[　　]

A．will
B．must
C．can
D．may

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You ________ be careful with fire when you have a picnic in the forest. It's too dangerous.

[　　]

A．will

B．must

C．can

D．may

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