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___ difficult the task may be, we must fulfil it this month.

A. No matter how B. No matter what       C. No matter when   D. No matter where

___ difficult the task may be, we must fulfil it this month.

A. No matter how B. No matter what       C. No matter when   D. No matter where

___ difficult the task may be, we must fulfil it this month.

A. No matter how B. No matter what       C. No matter when   D. No matter where

___ difficult the task may be, we must fulfil it this month.

A. No matter how B. No matter what       C. No matter when   D. No matter where

___ difficult the task may be, we must fulfil it this month.

A. No matter how B. No matter what       C. No matter when   D. No matter where