Don't all speak at once!________, please．

1. A.
   Each at one time
2. B.
   Once by one time
3. C.
   One for each time
4. D.
   One at a time

Don’t all speak at once! _______ please.

   A. One by one time    B. One for each time   C .Each at one time  D. One at a time

Don’t all speak at once! _____, please.

　 A. Each at one time 　 B. one by one time

　 C. one for each time 　 D. One at a time

Don't all speak at once! ________，please．

1. A.
   Each at one time
2. B.
   One by one time
3. C.
   One for each time
4. D.
   One at a time

Don’t all speak at once! ___ please.

A. Each at one time   B.One by one time  C.One for each time  D.One at a time