The discovery of how bronze is made was probably accidental, but it
to be an important event.
| A．turned over | B．turned about | C．turned out | D．turned off |
In communication, a smile is usually ______ strong sign of ______ friendly and open attitude.
| A．the; / | B．a; an | C．a; a | D．the; an |
It is demanded that the plan _____ out as soon as possible.
| A．must be carried | B．is to carry out | C．carried | D．be carried |
—Who should be responsible for the accident?
—The boss, not the workers. They just carried out the order.
| A．as telling | B．as are told | C．as told | D．as they told |
During an interview, journalists always prepare the next question _____ on the interviewee says.
| A．depend | B．depending | C．depended | D．to depend |
The law does not allow people to accuse themselves _____ a crime.
| A．about | B．for | C．of | D．in |