The passive voice of .
It is time to wind up the class .
AIt is time for the class to be wound up .
BIt is time for the class to wound up .
CIt is time for class to be wound up .
DIt is time for the class to be wind up .
The passive voice of .
It is time to wind up the class .
AIt is time for the class to be wound up .
BIt is time for the class to wound up .
CIt is time for class to be wound up .
DIt is time for the class to be wind up .