Theme parks try to make sure that visitors leave _____ more about their theme.
A. to know B. knowing C. know D. known
Mother _____ us stories when we were
young. 
A. was used to tell B. is used to telling C. used to tell D. used to telling
The book was so _____ that I couldn’t help laughing from beginning to end.
A. amused B. bored C. amusing D. boring
It was because his father was ill _____ he
did not go to work. 
A. so B. that C. what D. why
_____ is no doubt _____ he will be
successful someday. 
A. There; whether B. There; that C. It; whether D. It; that
Only when I left my parents for Italy ________ how much I loved them.
A. I realized B. I had realized C. had I realized D. did I realize
