It’s their duty for the soldiers our country our enemies.
9.Not until the third day after the terrible earthquake ______ a phone call from his mother.
8.Without your kind help, we ______ in the experiment.
7.Since you are here, you ____ as well stay here for long.
6.What ______ great progress you have achieved in such ____ short time!
5.The little kid can help himself _____ his favorite toys.