There are two books _____the sofa. [ ]

Did the actor live alone in his house? —Yes. He has a wife and two children. But ____ of them lives with him.

A study shows that a tropical fish in America can survive (存活) _____ water for up to 66 hours. [ ]

_____ warm idea came to me that I might use ______ pocket money to buy a gift for my mother on Mother’s Day.

How many members are there in the English Drama Club?— the members is twenty, of them are girls.