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—Must I turn off the gas after cooking ? 

--Of course . You can never be ___ careful with that.

    A．enough          B．too            C．so             D．very

—Must I turn off the gas after cooking ? 

—Of course . You can never be _______ careful with

that.

A．enough          B．too            C．so             D．very

.—Must I turn off the gas after cooking ?  --Of course . You can never be ___ careful with that.

   A．enough          B．too            C．so             D．very

—Must I turn off the gas after cooking?

—Of course. You can never be ____ careful with that.

A. enough                B. too                     C. so                      D. very

—Must I turn off the gas after cooking ?  --Of course . You can never be ___ careful with that.

    A．enough          B．too            C．so             D．very