What shall we prepare for our picnic this weekend?- Well let’s discuss it lunch.A

问题补充：

--- What shall we prepare for our picnic this weekend?

--- Well, let’s discuss it lunch.

A. at

B. with

C. over

D. by

答案：

A. at

B. with

(答案→)C. over

D. by

解析：——我们将为这个周末的野餐准备些什么？

——哦，咱们在午饭期间讨论这事。

故应选C。A. at 在（某时刻） B.with 用（某种有形的工具） C.over 在……期间 D. by 后接交通工具，“乘”