来自关新的问题
Ifitdoesn’traintomorrow,we'llhaveasportsmeeting.=_____it_____tomorrow,we'llhaveasportsmeeting.
Ifitdoesn’traintomorrow,we'llhaveasportsmeeting.
=_____it_____tomorrow,we'llhaveasportsmeeting.


Ifitdoesn’traintomorrow,we'llhaveasportsmeeting.=_____it_____tomorrow,we'llhaveasportsmeeting.
Ifitdoesn’traintomorrow,we'llhaveasportsmeeting.
=_____it_____tomorrow,we'llhaveasportsmeeting.
Unlessitrainstomorrow,we'llhaveasportsmeeting.