Question

A tourist will easily lose his way in Beijing ______ he has a map or a guide.

A．if

B．because

C．unless

D．when

Answer 1

C

四個選項分別表示如果、因為、除非和當……時候，根據題意選項C為最佳答案，旅行者很容易在北京迷路，除非他有地圖或者向導。