befor you leave the house,make sure i t___be closedis closedclosed

befor you leave the house,make sure i t___be closedis closedclosed
befor you leave the house,make sure i t___
be closed
is closed
closed

befor you leave the house,make sure i t___be closedis closedclosed
is closed
时态是现在时所以用is
close和it是it被close,所以用被动语态