The students put down their pens when the teacher_____ them to stop writing.
| A．said | B．spoke | C．told | D．talked |
Hillary Clinton arrived in Beijing yesterday, ______ the start of her short visit to China.
| A．marked | B．having marked | C．marking | D．to mark |
You can make a complaint to the local government ______ you are happy with the way things are.
| A．unless | B．if | C．once | D．as |
---- I wonder ______ Mr. Black changed his mind to take part in the movement.
---- After he listened to the speech by Mr. King.
| A．when was that it | B．when was it that | C．when that was | D．when it was that |
We finally managed to make the customers ______ of the quality of the vehicle.
| A．to convince | B．convincing | C．convince | D．convinced |
---- Mr. Wang got the first prize in the singing competition last week.
---- Oh. That’s what he ______ for years.
| A．had been expecting | B．has expected | C．expected | D．has been expecting |