2, They might have lost our address.
3, They might not have got our invitation.
4, They might have forgotten where we live.
5, Their car might have broken down.
6, They might have been held up by a traffic jam in the centre.
7, Someone might have been held up by a traffic jam when they were leaving.
8, They might have lost their way.
9, They might have gone into the wrong way.
10, They might have been stopped and robbed by the burglars.
Chúc em sức khỏe và học tốt nhé!
