【单选题】Which club has Mary already joined?
【单选题】We all hope ____ scientists. A. become B. to become C. becoming D. became
【单选题】三脚插头主要体现了TRIZ法40条发明原理中的哪一条?
【单选题】--Is Peter a new member in your art club? --No. He _____ our club for two years.
【单选题】It _____ more than half a year since I _____ a teacher. [ ]
【简答题】The ______ (member) of the club has now increased to a total of 800.