I take my grandma to the park on Sundays unless the weather is bad., I help my classmates with their homework every day after school unless I don't know the answers. , Unless I have to take part in other school activities , I do voluntary work every weekend . , Unless I have no money , I buy a flag on flag days . , So much energy will be wasted unless we switch off the lights. , Unless we plant more trees , there will be enough fresh air. , Your classmates will not help you unless you ask them in a more polite way. , Unless the students tell the truth , the teacher will punish them. ,

unless

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