They have no classes ________ Saturday and Sunday.

A. in          B. on            C. at           D:from

They have no classes ________ Sunday.

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

We have no classes ________ the afternoon of Wednesday．

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

You have no classes on Sunday, ________?

1. A.
   do you
2. B.
   don't you
3. C.
   have you
4. D.
   haven't you

They have no classes ______ Saturday and Sunday.

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