The hotel was so awful that we wrote a letter of _______ to the travel agency when we got back.
_______ has been a topic of continual geological research.
The pool should not be made so deep______small children can be safe there.
Long ago, women were_________to vote in political elections.
She asked me______I was looking at.
The word "allocated" in the passage mostly means "______".
Standing on the tip of the cape,____________________ .
Education in many countries is compulsory________the age of 16.
__________ John Kennedy was elected president, he was the youngest American President ever.
The examination was not very difficult, but it was_____________________ long.
Only one of our gifted students______to participate in the final competition.