--- Where is Jack? I can’t find him anywhere.

--- He ______ his homework upstairs.

1. A.
   might have done
2. B.
   must have done
3. C.
   might be doing
4. D.
   must do

---Where is Jack?I can’t find him anywhere.
---He______ his homework upstairs.

1. A.
   might have done
2. B.
   must have done
3. C.
   must be doing
4. D.
   must do

--- Where is Jack? I can’t find him anywhere.

   --- He ______ his homework upstairs.

   A. might have done  B. must have done    C. might be doing D. must do

 - Where is Jack? I can’t find him anywhere.
    - He ______ his homework upstairs.
    A. might have done       B. must have done        C. might be doing      D. must do

--- Where is Jack? I can’t find him anywhere.

--- He ______ his homework upstairs.

A. might have done B. must have done　 C. might be doing　 D. must do