Question

【题目】【2016四川成都】You are not supposed to go to a family patty unless you ______ to in the US.

A. are not invited B. are invited C. will be invited

Answer 1

【答案】B

【解析】

试题分析：句意：在美国如果你不被邀请，你不应该参加家庭聚会。Unless引导的条件状语从句，主句将来时或有情态动词，从句用一般现代时。故选B。