2. 外语
  3. Since 1970, millions of enthusiasts ______ a substance which they believe can remedy the common cold—Vitamin C.

Since 1970, millions of enthusiasts ______ a substance which they believe can remedy the common cold—Vitamin C.

admin2013-11-10  38
问题 Since 1970, millions of enthusiasts ______ a substance which they believe can remedy the common cold—Vitamin C.
选项 A、have taken
B、have been taking
C、have been taken
D、have being taken
答案B
解析 语法结构题。本句的关键点是：与since引导的时间状语相呼应，主句动词使用现在完成进行时。本句的意思是：1970年以来，数百万狂热者一直在服用一种他们认为能治感冒的物质——维生素C。
转载请注明原文地址:https://jikaoti.com/ti/47yMFFFM
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)