We have lunch ________the middle of the day.

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

We have lunch ______ the middle of the day.

[    ]

We have lunch ________the middle of the day.

[　　]

We have lunch ________the middle of the day.

[　　]

We have ________ lunch in ________ middle of ________ day．

1. A.
   (不填); a;(不填)
2. B.
   the;(不填); an
3. C.
   a; the;(不填)
4. D.
   (不填); the; the