Nobody knows how he was murdered, but _______ people behind the scenes can guess why.
| A．a great deal of | B．a good many | C．a good amount of | D．a great many of |
Tom hardly had time for concerts at that time, ________？
| A．wasn't he | B．was he | C．did he | D．didn't he |
—Must I return the book tomorrow?
—No, you ________.You can keep it for three days.
| A．mustn't | B．needn't | C．can't | D．may not |
The Olympic Games is held ________.
| A．each four years | B．every four years | C．each four year | D．every four year |
Hainan is a very good island.It's the second ________ island in China.
| A．largest | B．large | C．larger | D．most large |
The accident happened ________ a cold winter morning.
| A．in | B．at | C．of | D．on |