---Fish need water to survive; _____ , we human beings rely on air to live.
| A．particularly | B．obviously | C．actually | D．similarly |
All workers in this factory are required to _______at the age of 60.
| A．resign |
| B．retire |
| C．restrain |
| D．retreat |
(2012年天津卷，2)The letters for the boss _______on his desk but he didn't read them until three days later.
| A．were put |
| B．was put |
| C．put |
| D．has put |
In China，as we all know，brides are often dressed in red as it is a ______of good fortune.
| A．slogan |
| B．brand |
| C．logo |
| D．symbol |
Your suggestion on how to improve English writing ability is too general. Could you make it more________？
| A．specific |
| B．particular |
| C．special |
| D．relaxing |
The school made it a rule that the students should ______to their feet when class begins.
| A．stand |
| B．set |
| C．rise |
| D．struggle |