Don't ________ late for school again．

1. A.
   is
2. B.
   are
3. C.
   was
4. D.
   be

Don't ________ late for school, children.

1. A.
   is
2. B.
   am
3. C.
   being
4. D.
   be

Don't _______ late for school．

A．is                 B．be                C．arrives