Due to bad weather we have to put ___ off until next week to go camping in the mountains．

 Susan was expecting her favorite singers，but to her disappointment,         appeared   

He had  lost his temper and his health in the war and never found     of them again.

The primate brain is larger than　　of other animals.

---- Which of these digital cameras do you like best? ---- ______. They are both expensive and of little use.