Jack left ________ message for me, saying he was in ________ trouble.
A. a; the B. a; / C. /; / D. the; a
________ with what he said, what he did was more valuable.
A. Comparing B. Compare C. To compare D. Compared
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
