_________ that this region was so rich in natural resources.
A、Little he knew
B、Little did he know
C、Little he did know
D、Little he had known
—Have you heard the latest news？
—The last one ________ pays the meal.
We _________ so as not to wake the roommates.
Some pre school children go to a day care center，_________ they learn simple games and songs.
_________ nothing more to discuss，the CEO got to his feet，said goodbye and left the meeting room.
D、As there being