While your parents are ........ ., mine are liberal in their views.

While your parents are ........ ., mine are liberal in their views.

Answer Details

The sentence is making a comparison between two sets of parents, one set being "strict" and the other set being "liberal" in their views. The word "strict" means that someone is very severe in their actions or behavior, and this could be related to a parenting style that is very authoritarian and doesn't allow much freedom. So the missing word is "strict".