Since1970,millions of enthusiasts __ Vitamin C,which they believe can remedy the common cold.(A have been taken B have been taking)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/18 19:16:04
Since1970,millionsofenthusiasts__VitaminC,whichtheybelievecanremedythecommoncold.(AhavebeentakenBhav

Since1970,millions of enthusiasts __ Vitamin C,which they believe can remedy the common cold.(A have been taken B have been taking)
Since1970,millions of enthusiasts __ Vitamin C,which they believe can remedy the common cold.(A have been taken B have been taking

Since1970,millions of enthusiasts __ Vitamin C,which they believe can remedy the common cold.(A have been taken B have been taking)
b