Three people spoke at the meeting.____was a doctor; ____was a student; ___was a teacher.
| A．He; she; I | B．The first; the other; the rest |
| C．One; another; the third | D．This; that; the last |
Two big guns are fired, and it is the __________ for the celebrations to begin.
| A．mark | B．sign |
| C．signal | D．symbol |
The red light is a __________ of stopping the cars.
| A．sign | B．signal |
| C．mark | D．symbol |
They have read the paper many times, but it doesn't make any __________.
| A．sense | B．value |
| C．mark | D．symbol |
He's got himself into a dangerous situation __________ he is likely to lose control over the plane.
| A．where | B．which |
| C．while | D．why |
It's helpful to put children in a situation __________ they can see themselves differently.
| A．that | B．when |
| C．which | D．where |