Ann was a good mood and kept jokes to us.
A. in, saying
B. on, telling
C. in, to tell
D. in, telling
网友回答
A. in, saying
B. on, telling
C. in, to tell
(答案→)D. in, telling
解析：in a good mood心情好的意思,keep doing一直做某事,反复做,keep to do坚持做某事,根据题意选D,安心情很好一直和我们开玩笑.