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.

admin2012-06-10  31
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 由题千中的Since 1970可知，主句的时态应使用现在完成进行时，故答案为[B]。
转载请注明原文地址:https://kaotiyun.com/show/3kmK777K
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)