单选题 There is no cure for the disease yet, but these rugs can ______ its development.
A. break down B. take down C. slow down D. track down

【正确答案】 C

【答案解析】考查词组。break down“打破。崩溃”，take down“记录，记下”，slow down“减缓”，track down“追踪”。故选C。