题目

题型：不详难度：来源：

. The flowers his friend gave him will die unless __________ every day.
A. watered      B. watering    
B. water D. to water

答案

A

解析

A。因“花”与“浇水”之间为被动关系，所以选过去分词。其实，unless watered可视为unless they are watered之省略。类似的还有：Unless changed. this law will make life difficult for farmers. 这项法令除非进行修改，否则将给农民的生活造成困难。