Can those ____ at the back of the classroom hear me?

No problem.

A. seat          B. sit         C. seated         D. sat

------Can those_____ at the back of the classroom hear me?

------- No problem.

A. seat    B. sitted    C. seated   D. sat

 –Can those           at the back of the classroom hear me?

    -- No problem.

    A. seat         B. sit          C.seated            D. sat

Can those ____ at the back of the classroom hear me?

No problem.

A. seat          B. sit         C. seated         D. sat

--- Can those __________ at the back of the classroom hear me?

--- No problem.

A. seat          B. sit             C. seated            D. sat

–Can those           at the back of the classroom hear me?

-- No problem.

A. seat                  B. sit                     C. seated               D. sat

---Can those______at the back of the classroom hear me?
---No problem.

1. A.
   seat　　　
2. B.
   sit
3. C.
   seated　　　
4. D.
   sat

― Can those ____ at the back of the classroom hear me?

―No problem.

A. sit           B. sitting               C. seat                 D. seating