English Tense Tense Question #2991 (CAT-I)

Change the voice: We had to stop all other work to complete our assignment.

A All other work has to be stopped by us to complete our assignment
B All other work had stopped by us to complete our assignment
C All other work had to be stopped by us to complete our assignment
D All other work was stopped by us to complete our assignment
Correct Answer & Explanation
Option C
Option C is the correct answer according to official curriculum guidelines.