Would you like to us in our discussion?A. take part inB. join C. taking part inD. joining

问题补充：

Would you like to us in our discussion?

A. take part in

B. join

C. taking part in

D. joining

答案：

A. take part in

(答案→)B. join

C. taking part in

D. joining

解析： would you like to 后面跟动词原形；take part in ，参加某项活动；join和某人一道做…。