Entering the reading room, ______

1. A.
   Mike and Tom were found seated quietly, doing their homework
2. B.
   Mike and Tom were found seating quietly, doing their homework
3. C.
   he found Mike and Tom seating quietly, doing their homework
4. D.
   he found Mike and Tom seated quietly, doing their homework

Entering the reading room, ______.

Entering the reading room, ______.

A. Mike and Tom were found seated quietly, doing their homework

B. Mike and Tom were found seating quietly, doing their homework

C. he found Mike and Tom seating quietly, doing their homework

D. he found Mike and Tom seated quietly, doing their homework

Entering the reading room, ______.