______,the boy couldn’t enter his house.
| A．Since the key had lost | B．T he key being lost |
| C．Lost the key | D．Having lost the key |
They made a bet _____the white horse.
| A．for | B．with | C．on | D．in |
He _____ himself in Shanghai.
| A．lost | B．missed | C．losing | D．missing |
I was about to leave _____ the telephone rang.
| A．then | B．when | C．that | D．and when |
Children under 10 are not permitted _____ the film.
| A．to see | B．seeing | C．saw | D．watched |
All he was thinking about was ____ he would do with the big sum of money his father gave him.
| A．how | B．what | C．that | D．Whether |