No one except Jack and Tom                the answer.

_______ about the universe up till now.

　 A. So little had me known 　 B. Only a little do we know

　 C. Very little have we known 　 D. Little shall we know

Very few                his address in the town.

Dick made it _____ to all his friends.

　　A. to know 　　 　　　 　 　　 　　　 B. known

　　C. know　　　　　　　　　　　　　　　　D. knowing

Not until Mr. Smith came to China ______what kind of a country she is from.

　 A. Didn’t he know 　 B. Had he known

　 C. Hadn’t he known 　 D. Did he know