Look! What a mess the room is! In my opinion, it needs ______.
New ways have been found to prevent the river ______.
The subject ________ I am most interested is English.
Mr. Full apologized ______ the children ______ what he had done.
---You seemed to be impressed by his skill. ---No. It was his courage ________ his skill that really impressed me.
We must face the fact __________ our time is limited and we must cherish every minute.