________ nearly all behavior is learned behavior is a basic assumption ________ has been put forward by social scientists.
| A．What; that | B．That; what |
| C．What; what | D．That; that |
Have you found out the exact reason why the dinosaur _________ many years ago?
| A．died down | B．died out | C．died from | D．died of |
With the development of Chinese economy, many unexpected problems have ________; for example, the prices of our daily goods and housing are ________ sharply.
| A．arisen; rising | B．arisen; raising | C．raised; rising | D．risen; arising |
The field research will take Luffy and Steven about two weeks; it will be a long time _______ we _______ again.
| A．before; met | B．since; meet | C．before; meet | D．since; met |
The person who is _______ of the factory _______ ill since last week.
| A．in charge; has been | B．in the charge; fallen |
| C．taking charge; was | D．in charge; fell |
Diaoyu Islands are made up of a group of islands, ________ China since ancient times.
| A．belongs to | B．belonged to | C．are belonged to | D．belonging to |