Why don’t you go to visit the Great Wall with us—Because I _______ there many times.

______is known to us all, only the theory ______ onpractice can be practical.

______ Daley has always been the focus of much media attention, he tries to lead a normal life.

came into her room, she was________in her book.

The demand that the law on gun ownership _____ be changed ___ is very strong.