How do you think _________that he was an hour late on such a short journey?
| A．it came about | B．did it come about |
| C．it was come about | D．was it come about |
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 |