第1个回答 2013-11-19
If they had left home at the very early morning, they would have had arrived there in half an hour.
第2个回答 2013-11-19
If they leave the house early in the morning,They got to half hours
第3个回答 2013-11-19
If they had left home earlier in the morning, they would have arrived in half an hour.本回答被提问者采纳