A
1.I had better stay here
2.We had better wait for him
3.You had better call a doctor
4.They had better go home
5.She had better hurry
6.You had better be careful
B
1.I'll go to Sydney in a month's time
2.The next train will leave in an hour's time
3.I'll fly to Beijing in two day's time
4.Jean and I will go to London in an hour's time