22．― do you write to your pen friend? ―Once a month． A．How long B．How many C．How often D．How much 【查看更多】

 

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—           do you write to your pen friend?  

—Once a month．

A．How long                                  B．How many

C．How often                                   D．How much

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－________ do you write to your pen-friend?

－Once a month．

[　　]

A．How long

B．How many

C．How often

D．How much

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