If this product does not give you complete satisfaction please return it to the manufact

问题补充：

If this product does not give you complete satisfaction, please return it to the manufacturer, stating when it .

A. is purchased

B. will be purchased

C. purchases

D. has purchased

答案：

(答案→)A. is purchased

B. will be purchased

C. purchases

D. has purchased

解析：答案：A考查时态和语态。句意：如果你对产品不完全满意，请退回给生产商，并注明购买的时间。purchase和it构成动宾关系，故应用被动语态。此处说的是一般性情况，故用一般现在时。