---Did you listen to the lecture? ---Yes, I have never heard a ___________ one. 

The only drawback of the voyage was the ______ sea, which made me very seasick.

Grandpa is old, but he is still very ____.

_____ fighting is not allowed in our society, because we love peace and friendship.

I’ve been writing this report ____for the last two weeks ,but it has to be handed it tomorrow.