We were all favor of this plan after we discussed for about two hours.A. atB. inC. toD. o

问题补充：

We were all favor of this plan after we discussed for about two hours.

A. at

B. in

C. to

D. on

答案：

A. at

B. in

C. to

D. on

解析：句意：我们讨论了大约两个小时后大家都赞成这个计划。与favour of搭配的介词是in，即in favour of(赞成，支持)，所以选B。