The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.

   A. once      B. when       C. if       D. unless

The school rules state that no child _______ be allowed out of the school during the day unless they are with an adult.

 A. shall               B. will         C. need             D. might

The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.

 The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.

   A. once      B. when       C. if       D. unless

 The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.

   A. once      B. when       C. if       D. unless

The school rules state that no child shall be allowed out of the school during the day, ______

accompanied by an adult.

　 A. once　　 B. when　　　 C. if　　　 D. unless

The school rules state that no child shall be allowed out of the school during the day，________accompanied by an adult.

A．once  B．when  C．if  D．unless

 The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.

   A. once      B. when       C. if       D. unless

The school rules state that no child shall be allowed out of the school during the day, __________ accompanied by an adult.

1. A.
   once
2. B.
   when
3. C.
   if
4. D.
   unless