______ the students found the soldier’s idea interesting, the system was too difficult to be of practical use.
| A．While | B．Unless | C．As soon as | D．Even if |
a fire, hotel guests are asked to remain calm.
| A．As a result of | B．In the event of | C．By reason of | D．In the time of |
As is known to us, theory is based on practice and servers practice.
A. by chance B. in turn C. in return C. by turn
As soon as their party come into they changed the law.
| A．force | B．power | C．strength | D．energy |
Food and are very important to us all.
| A．clothes | B．cloth | C．clothing | D．dress |
This kind of clothes are out of nowadays.
| A．month | B．year | C．season | D．week |