请坦率地告诉我你对这个计划的真实想法。

Please be ___frank with me about your true thoughts on this plan.

邮局工作人员在信件上盖了邮戳。

The post office worker ___franked the letters before mailing them.

我们在野餐时吃了几个热狗。

We had a few ___franks during our picnic.