The flowers his friends gave him will die if every day.A. not wateringB. not wateredC. no

问题补充：

The flowers his friends gave him will die if every day.

A. not watering

B. not watered

C. not to water

D. not being watered

答案：

A. not watering

(答案→)B. not watered

C. not to water

D. not being watered

解析：考查状语从句的省略。补充完整是The flowers his friends gave him will die if they are not watered every day.因为从句主语和主句主语一致，并含有be动词，可把从句的主语和 be省略。所以选B。