The Olympic _____ remind us of where the Olympics are held and the characteristics of the host country.
| A．symbols | B．signals | C．marks | D．signs |
By the year 1889, there were just 541 bison ________ in the whole of North America.
| A．leaving alive | B．to leave alive |
| C．to be left alive | D．left alive |
The number 911 is a special number, ________, I think, that will be remembered by the Americans forever.
| A．what | B．it | C．which | D．one |
After _________ seemed like hours, a nurse wheeled Doris out of the emergency room.
| A．that | B．there | C．which | D．what |
---I am going to the supermarket to buy a quilt.
--- ________ You can easily buy one on the Internet.
| A．Why not? | B．Good idea! | C．Why bother? | D．By no means. |
The doctor persuaded him to _____ smoking.
A throw away B put out C give up D take away