In our school, the students have three__________ courses and seven __________courses.
| A．required ;alternative | B．require ;alternative |
| C．requiring ; alternative | D．reqiure;alternative |
Nowadays some hospitals refer to patients ________ name, not case number.(2010·江西)
| A．of | B．as | C．by | D．with |
He invited me to a dance after the show ________ Christmas Eve.(2009·陕西)
| A．at | B．on | C．in | D．by |
Four Chinese models were ________ the 14 people awarded prizes on Friday at the World Supermodel Competition.(2009·上海)
| A．among | B．between | C．along | D．beside |
It's not easy to change habits，________ with awareness and self－control，it is possible.
| A．for | B．or | C．but | D．so |
There's no way of knowing why one man makes an important discovery________another man，also intelligent，fails.
| A．since | B．if | C．as | D．while |