He took his umbrella with him lest it ____(rain).
should rain
暂无解析
Decision makers must have some way of determining of several alternatives is best.（）
Althoughtheyagreethatlifeisimportantandshouldberespected,theyfeelthatthequalityoflifeshouldnot__(ignore).
At the end of the conference, all the_(participate) were asked to fill out a questiolmaire
Expertshavefoundthatnormalsleepcanbedividedintofive______stages
You may use bike________ you give it back to me tomorrow morning
