He has made a lot of films, but_____ good ones. 

I visite Zhangjiajie during the summer vacation .It’s a pleasant trip, ____I’ll never forget. 

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

— Would you like to order the two robots?— Yes, one is to help me with my homework, and ______ is for my mother to do housework.

--- Can the twins carry the boxes to their bedroom?--- I’m afraid _____ of them can do it. They are too young.