Expertshavefoundthatthediseasewillleadtoagreaterincreas...

问题详情：

Experts have found that the disease will lead to a greater increase in the number of sufferers unless ________ seriously when the symptom （症状）first appears.

A. treated              B. to be treated       C. being treated           D. be treated

【回答】

A

知识点：非谓语动词

题型：选择题