Silence, please, class．We're going to have a math test in this class．Now I am going to give ________ your test papers．

1. A.
   out
2. B.
   over
3. C.
   up
4. D.
   back

Silence, please, class．We're going to have a math test in this class．Now I am going to give

          your test papers．

A．out         B．over         C．up         D．back

Everyone was ________ silence when he asked the question.

1. A.
   at
2. B.
   in
3. C.
   on
4. D.
   to