Question

【题目】A tourist will easily lose his way in shanghai_____ he has a map or a guide.

A. if B. since C. while D. unless

Answer 1

【答案】D

【解析】

试题分析：句意：在上海旅游会很容易迷路除非他有地图或者指南。if 如果； since 从；while当…的时候； unless除非。根据前后分句句意可知该选D。