All the photographs in this book，__________ stated otherwise, date from the 1950s.
| A．unless | B．until |
| C．once | D．if |
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 |
—________ fine weather it is today!
—Let's go for a picnic.
| A．What | B．How | C．What a | D．How a |
He doesn't like apples.I don't like them, ________.
| A．too | B．also | C．so | D．either |