Question

【题目】_______riding shared bikes is an easy way to travel, it also causes some problems.

A. Although B. If C. Until

Answer 1

【答案】A

【解析】

句意：虽然骑共享单车是一种简单的旅行方式，但也会引起一些问题。A. Although尽管，虽然；B. If如果；C. Until直到。根据下文it also causes some problems.可知上文是Although引导的让步状语从句。根据题意，故选A。