Not until Mr. Smith came to China ________ what kind of a country she is.

1. A.
   did he know
2. B.
   he knew
3. C.
   he didn't know
4. D.
   he could know

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

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

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

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