A new survey released by Yale University finds that Americans trust scientists most when ______ comes to information on climate change．
| A．that | B．it | C．this | D．there |
—Where is the shooting centre?
—It is about 50 kilometres ______ the city of Beijing.
| A．in south of | B．south of | C．the south of | D．southern of |
Though difficult, I ________ him find a job, which made him very pleased.
| A．tried to help | B．managed to help |
| C．tried helping | D．succeeded to help |
He was inspired to start again _________ he had failed.
| A．where | B．in which | C．when | D．what |
–She looks very happy. She ________have passed the exam.
--I guess so. It’s not difficult after all.
| A．should | B．must | C．could | D．might |
The Australian boy has a good __________ of Chinese and can express himself freely in it.
| A．demand | B．power | C．command | D．usage |