—This returned Chinese scholar has become one of the top experts in this field.—Yes , I know him very well. He ___________ in Africa with wild animals for eight years.
In recent years much more emphasis has been put______ developing the students productive skills.
_____ of water makes Death Valley a desert, but it is by no means devoid.
There are some police cars in front. What do you suppose _____?
Tina _____ have known the truth, or she would have told us.
_____ their real economic situations, they got some relief fund from the government.