Speech is ______ heard when it is given in a clear voice just slightly louder than normal.
| A．hardly | B．less | C．completely | D．best |
Parent should take seriously their children’s requests for sunglasses _______ eye protection is necessary in sunny weather.
| A．unless | B．because | C．though | D．so |
--- Do you know the reason _________ pilots turn off the plane’s lights before taking off?
---The practice is for the passengers to adjust to the dark _________ an emergency.
| A．why; for fear that | B．for which; in case of |
| C．how; for fear of | D．that; in case |
---Where did you meet him?
---It was in the hotel _________ I was staying.
| A．that | B．how | C．where | D．which |
The process of curing a disease is like a war ___ different soldiers fight against an enemy.
| A．when | B．where | C．what | D．that |
In a sports team each player has a clear role，and there are few occasions members are confused or uncertain of their roles．
| A．which | B．that | C．when | D．how |